NEC Storage Manager Data Replication User’s Manual (Function Guide) IS015-9E
© NEC Corporation 2001-2004 No part of the contents of this book may be reproduced or transmitted in any form without permission of NEC Corporation. The contents of this book may be modified without notice in the future.
Preface This manual describes how to use the data replication function provided by NEC Storage DynamicDataReplication Ver2, NEC Storage RemoteDataReplication Ver2, and NEC Storage ReplicationControl. The data replication function consists of the replication volume creation function provided in a disk array and software to manage and operate it. It utilizes replication volume to make business operation more effective.
Description Corresponding Product Data Replication User’s Manual (Disaster NEC Storage Manager Data Replication User’s Manual Recovery System Installation and (Disaster Recovery System Installation and Operation Operation Guide) Guide) (IS027) Snapshot User’s Manual (Function Guide) NEC Storage Manager Snapshot User’s Manual (Function Guide) (IS030) 6.
Contents Chapter 1 Data Replication Overview ...............................................................................................................................1 1.1 Data Replication ..........................................................................................................................................................1 1.2 Examples of Applying Data Replication...................................................................................................................
3.3.1 Pair Setting/Unpair ............................................................................................................................................43 3.3.2 Replicate ............................................................................................................................................................50 3.3.3 Separate ....................................................................................................................................................
4.7.1 Logical Disk Information Display Command .................................................................................................172 4.7.2 Pair/Unpair Command.....................................................................................................................................175 4.8 Disk Array Operations.............................................................................................................................................178 4.8.1 4.
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Chapter 1 Data Replication Overview Chapter 1 Data Replication Overview To manage an enormous amount of information accumulated in business in a unified way and promote effective and efficient utilization of the information, a high-throughput, large-capacity, and high-reliability storage system is required. Data Replication provides functions to build and manage such a storage system. This chapter describes overview of Data Replication, hardware configuration, and software configuration. 11..
Chapter 1 Data Replication Overview 11..22 E Exxaam mp plleess o off A Ap pp pllyyiin ng gD Daattaa R Reep plliiccaattiio on n When you introduce Data Replication and use replication volumes which can be separated, you can get the following benefits. • The system down time during data backup is largely reduced. Lowered access performance to the business database during data backup in system operation can be prevented. • A test environment using the actual business data can be built more easily.
Chapter 1 Data Replication Overview The procedure for backup from a replication volume is described below. (1) During operation, the master volume (MV) and replication volume (RV) are connected. (2) Suspend the production task and separate the replication volume (RV). Resume the task after separation is complete. (3) Use the separated replication volume (RV) to perform backup and the task in parallel.
Chapter 1 Data Replication Overview 11..22..22 TTeesstt E Ennvviirroonnm meenntt S Seettttiinngg You can set the same environment as the production task environment easily by creating replication volumes using the Data Replication function. You can evaluate an application program by using data used in the production task, which makes evaluation of application programs more efficient.
Chapter 1 Data Replication Overview 11..22..33 P Paarraalllleell P Prroocceessssiinngg ooff S Seeaarrcchh O Oppeerraattiioonn By creating replication volumes of the master database, you can separate the database and carry out update tasks and search tasks using different volumes. This allows you to carry out database update tasks without affecting database search tasks.
Chapter 1 Data Replication Overview 11..33 S Syysstteem mC Co on nffiig gu urraattiio on n Business Server Backup Server Backup Software ReplicationControl Tape Drive ReplicationControl Management Server DB Replication • AccessControl LAN • DynamicDataReplication • RemoteDataReplication Storage Manager Disk Array Figure 1-6 System Configuration To install and use the Data Replication function, the following hardware devices are required.
Chapter 1 Data Replication Overview • Storage Manager Provides the disk array configuration and state display functions. Installing DynamicDataReplication and/or RemoteDataReplication allows the replication management function (hereinafter, referred to as the Replication Management) incorporated in iSM. The Replication Management provides setting and operating functions such as state display, pair setting, and replication operation for DynamicDataReplication or RemoteDataReplication.
Chapter 2 Data Replication Chapter 2 Data Replication This chapter describes the types and state transitions of volumes that are necessary to perform operation using the Data Replication function. 22..11 V Vo ollu um mee C Cllaassssiiffiiccaattiio on n To create replication volumes using the Data Replication function, you must set the relation between the original volume and the target volume (replication volume) first.
Chapter 2 Data Replication Disk Array A Disk Array B FC A1 A2 B1 IV IV IV A3 MV (PV) A4 RV/MV (dRV) B2 RV (rRV) Pair Setting Volume A1/A2/B1 : IV Volume A3 : MV (PV) of the pair A3/A4 Volume A4 : RV (dRV) of the pair A3/A4, and MV of the pair A4/B2 Volume B2 : RV (rRV) of the pair A4/B2 Figure 2-1 Example of Volume Classification 9
Chapter 2 Data Replication 22..22 R Reep plliiccaattiio on nO Op peerraattiio on nss The replication operations include Replicate that replicates data from MV to RV, Separate that separates between MV and RV, and Restore that replicates data from RV to MV. 22..22..11 R Reepplliiccaattee This operation copies data from MV to RV. It is performed to replicate the latest data to the replication volume used in a test environment or search tasks. When Replicate is executed, the data in MV is copied to RV.
Chapter 2 Data Replication 22..22..33 R Reessttoorree This operation copies data from RV to MV. It is performed to restore data from the backup volume (RV) when a failure occurs in MV. When Restore is executed, the RV contents at the point of starting Restore are reflected copied into the MV.
Chapter 2 Data Replication 22..33 R Reep plliiccaattiio on nO Op peerraattiio on nss aan nd dS Sttaattee T nssiittiio on nss Trraan This section describes the replication operations and state transitions. The pair setting is specified but MV and RV are separated. separated Difference between MV and RV is being reflected. MV sync RV Replicate • RV cannot be updated. • MV and RV can be updated. The pair setting is specified and synchronization has been established.
Chapter 2 Data Replication 22..33..11 R Reepplliiccaattee aanndd S Sttaattee TTrraannssiittiioonnss When Replicate is performed, data copy from MV to RV starts to reflect the content of MV to RV. Any update to MV after Replicate is also reflected to RV. After Replicate is started, the difference between MV and RV gradually decreases, and eventually the content of MV at the beginning of Replicate is completely reflected to RV (The difference is zero).
Chapter 2 Data Replication 22..33..22 S Seeppaarraattee aanndd S Sttaattee TTrraannssiittiioonnss When Separate is performed, the difference between MV and RV at the time of executing the Separate start instruction is reflected to RV and RV is separated. No update to MV after Separate is reflected to RV.
Chapter 2 Data Replication 22..33..33 R Reessttoorree aanndd S Sttaattee TTrraannssiittiioonnss When Restore is performed, data copy from RV to MV starts to reflect the content of RV at the beginning of Restore to MV. When Restore(update) is executed, any update to MV after Restore is also reflected to RV. After Restore is started, the difference between MV and RV gradually decreases, and eventually the content of RV at the beginning of Restore is completely reflected to MV (The difference is zero).
Chapter 2 Data Replication 22..33..44 A Accttiivviittyy S Sttaattee aanndd S Syynncchhrroonnoouuss S Sttaattee In data replication, Replicate, Restore, and Separate states are called “activity states”, or simply “activities”. The execution states indicating state transitions and the state in which the state transition is complete are called “synchronous states”. Table 2-1 shows the activity states and synchronous states which transit as a result of each replication operation.
Chapter 2 Data Replication 22..44 C Co op pyy C Co on nttrro oll S Sttaattee If the activity between volumes with the pair setting is the Replicate or Restore state, you can change the copy method of data between MV and RV according to the load status of the disk array. The state to which a transition is made by the instruction to change the copy method is called the “copy control state“. There are the following two types of copy between MV and RV in the Replicate or Restore state.
Chapter 2 Data Replication Copy control states can be specified when Replicate or Restore is performed. You can also change the copy control state you specified at Replicate or Restore as required. When Restore with RV protection specified is executed, only copy for reflecting the difference is executed, thus the updated data of the MV is not reflected into the RV.
Chapter 2 Data Replication 22..55 R Reellaattiio on nssh hiip pb beettw weeeen nC Co op pyy P Peerrffo orrm maan nccee aan nd dC Co op pyy C Co on nttrro oll S Sttaattee If the copy control state is set to the Synchronized Copy state, the difference between MV and RV is not accumulated because updates to MV are immediately reflected to RV. However, the write time to MV is longer because it waits for reflection of the updates to RV.
Chapter 2 Data Replication 22..66 R RV VA Acccceessss R Reessttrriiccttiio on n In the Replicate state and Restore state, MV is synchronized with RV to always match the volume data between MV and RV. Since the difference between MV and RV is reflected in the disk array independently of the operating system or file system, however, the volume of RV may become inconsistent.
Chapter 2 Data Replication Note 3: If “Read Only (RO)” is set for RV for which Separate was completed, keep the following operational notes in mind. 1. If NTFS is used as a file system, reference to the RV is disabled. 2. If FAT16/FAT32 is used as a file system, associate the file system with the drive by using the mount command of the disk control operation commands or by starting [Disk Management] (Windows). 3.
Chapter 2 Data Replication 22..88 F Frreeeezzee o off D Diisskk A Arrrraayyss If the power to the disk array is turned off for maintenance, access to the disk array is disabled, disallowing to continue copy operation for the paired volumes in the disk array. In this situation, the data replication function for the disk array stops replication operations of the whole disk array.
Chapter 3 Replication Management Chapter 3 Replication Management This chapter describes various operations of Data Replication by the Graphical User Interface (GUI). 33..11 R Reep plliiccaattiio on nM Maan naag geem meen ntt O Ovveerrvviieew w This chapter describes an overview of various operations and the management method regarding data replication that uses the replication management function. 33..11..
Chapter 3 Replication Management Table 3-1 lists the operations and state displays.
Chapter 3 Replication Management Table 3-2 List of Replication-Related Events Replication Management Operation Operation Operation Target Disk array Volume {: Regular report Other Operations Freeze { ∆ Defreeze { ∆ Change Background Copy level { ∆ Pair Setting/Unpair { ∆ Replicate { ∆ Synchronous State (rpl/sync) ∆ ∆ Separate { ∆ Separated ∆ ∆ Restore { ∆ Synchronous State (rst/sync) ∆ ∆ Suspend/Resume Copy { ∆ Change to Background Copy { ∆ Change RV Mode { ∆ Ch
Chapter 3 Replication Management 33..11..33 N Nootteess oonn O Oppeerraattiioonn Note the following points when operating replication management: [System Parameter Setting (on UNIX)] For more information, refer to the “User’s Manual (UNIX)”. [Messages at Start] Immediately after iSM is started, replication-related device information is created internally. Replication-related device information is recreated according to an information recreate instruction from ReplicationControl.
Chapter 3 Replication Management 33..22 E Exxp pllaan naattiio on no off R Reep plliiccaattiio on nS Sccrreeeen n To perform an operation, select the volumes you want to perform the operation to in the Volume List Displayed on the Replication Information tab in the Replication Screen, and then click the [menu] on the menu bar. You can also right-click the volume to display the menu. 33..22..
Chapter 3 Replication Management 33..22..22 C Coonnffiigguurraattiioonn D Diissppllaayy A Arreeaa The configuration display area is under the monitoring by the iSM and displays the list and the state of the Disk Arrays that can use the Replication function, as well as the status of link among them.
Chapter 3 Replication Management Disk Array icon Icon , , (in colors) Description , etc. Indicates that the disk array is normally operating. Indicates that the license capacity of the DynamicDataReplication, RemoteDataReplication, or RemoteDataReplication/DisasterRecovery is insufficient. * If license capacity is insufficient, you cannot execute pair setting/unpair. Indicates that the fault occurs in any link path between disk arrays.
Chapter 3 Replication Management license • Unmanaged disk arrays 33..22..33 R Reepplliiccaattiioonn IInnffoorrm maattiioonn S Sccrreeeenn When click the [Replication Information] tab in the information list display area, the volume information of the volumes in the selected disk array is displayed (refer to Figure 3-3 “Example of Replication Information Screen”). MV and RV are displayed in one line respectively (a total of two lines) for a pair and IV is displayed in one line.
Chapter 3 Replication Management (i) Classification The volume types (volume attributes) are displayed. Displayed Icon Description (Green) MV. Indicates Master Volume which is the volume of replication origin. (Light Blue) RV. Indicates Replication Volume which is the volume of replication target. (White) IV. Indicates Isolated Volume and is the volume except the replication object. IV becomes MV or RV by operating pair setting. Indicates the volume on which a copy fault occurs.
Chapter 3 Replication Management (iv) Logical Disk Name The identification name or identifier (see Note ) given for the logical disk is displayed. It is the same as the logical disk name displayed in the main screen (State Monitoring screen) and can be changed from the main screen (State Monitoring screen).
Chapter 3 Replication Management (viii) Disk Array The identification name given to the Disk Array including the volume indicated by “Pair Number” is displayed. It is the same as the Disk Array Name displayed in the main screen (State Monitoring screen), and can be changed from the main screen (State Monitoring screen).
Chapter 3 Replication Management (x) Copy Control State The control status in copying is displayed. For more information, refer to 2.4 “Copy Control State”. Display Description Foreground Copy Indicates the copy state in the synchronous or semi-synchronous mode. Background Copy Indicates the asynchronous copy state by difference management. Freeze Indicates that the data replication function is frozen. Suspend Indicates that copy operation is suspended.
Chapter 3 Replication Management (xiv) Number of Pairs Indicates the number of related pairs. This value is equal to “the number of volumes which make up the pair link” minus 1. An example of pair relations and Number of Pairs is shown below.
Chapter 3 Replication Management 33..22..44 D Diisskk A Arrrraayy LLIIN NK K IInnffoorrm maattiioonn S Sccrreeeenn When you click the [Disk Array LINK Information] tab in the information list display area, the link information currently set between the disk arrays is displayed (refer to Figure 3-4 “Example of Disk Array LINK Information Screen”). To perform sort, click the item name by which you want to sort. You can drag&drop an item to permute the order of the items.
Chapter 3 Replication Management (ii) LINK Disk Array Name Indicates the identification name assigned to the linked disk array. (iii) Path Number Indicates the connection path number in the link. If the link is connected via four paths, the path numbers are 0, 1, 2, and 3, respectively (refer to Figure 3-5 “Replication Link Information”). (iv) Path State Display Description Normal Indicates the normal status. Offline Indicates that the link setting is unconfirmed during startup of the disk array.
Chapter 3 Replication Management Figure 3-5 shows an example of two disk arrays connected to Disk Array 1 for using RDR. The following shows an example of 3000/4000 series.
Chapter 3 Replication Management 33..22..55 M Meennuu IItteem m LLiisstt The list of menu bar items of Replication Management is shown below. For details, refer to description on each menu item. 3.3.13 “CSV Output of Information List Display” 3.3.14 “Save Pair Setting Information” Closes the Replication screen. Shows or hides the status bar. Shows or hides IVs. 3.4.8 “Display Copy Fault List” 3.4.5 “Record Screen Information” 3.4.3 “Environment Setting” 3.3.
Chapter 3 Replication Management 3.3.8 “Forced Separate” 3.3.9 “Forced Unpair” 3.3.10 “Freeze/Defreeze” 3.3.11 “Background Copy Level Change” For details on operations related to the AT-group, refer to the “Data Replication User’s Manual (Disaster Recovery System Installation and Operation Guide)”. Displays Help on the Replication screen. Displays Help on the dialog list regarding Replication screen.
Chapter 3 Replication Management 33..22..66 IInnffoorrm maattiioonn D Diissppllaayyeedd oonn E Exxeeccuuttiioonn D Diiaalloogg The Execution dialog displayed for replication operations can be switched to [Summary] or [Details] display mode for the volume-related information displayed. In the description given below, the unpair execution dialog is used as an example. You can read “operation” in the description as “Replicate”, “Restore”, etc. to be carried out.
Chapter 3 Replication Management (iv) Logical Disk Name Displays the logical disk name of MV. (v) Copy Control State Displays the control state during copy. (vi) Sync State Displays the transition status in the activity state. (vii) Copy Mode Displays the Synchronous/Semi-synchronous mode during copy operation. (viii) Number Displays the logical disk number of MV. (ix) MV Disk Array Name Displays the disk array name to which MV belongs. (x) Pair Disk Name Displays the logical disk name of RV.
Chapter 3 Replication Management 33..33 V Vaarriio ou uss O Op peerraattiio on nss o off R Reep plliiccaattiio on n M Maan naag geem meen ntt 33..33..11 P Paaiirr S Seettttiinngg//U Unnppaaiirr To perform replication operations, you must set pairs beforehand. To set a pair, set the original volume as MV and the target volume as RV. You can also use the volume you have set as RV in another pair by setting it as MV. You can set pairs freely within the following bounds.
Chapter 3 Replication Management [Operation Procedure] Pair Setting Do one of the following to display the Pair Setting screen. y Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, and then select [Pair Setting]. y Right-click in the Replication Information screen, and then select [Pair Setting]. In pair setting, whether the selected volume can be set as MV is determined automatically.
Chapter 3 Replication Management Figure 3-9 shows an example of the Pair Setting Screen. (i) (ii) (iii) (iv) (v) Figure 3-9 Example of Pair Setting Screen After the Pair Setting, the copy operation such as Replicate, Restore etc. is available. (i) Data Replication Mode Select the method of setting pairs. Radio Button Description Dynamic Data Replication (within a Disk MV and RV use the volumes in the same Disk Array) Array.
Chapter 3 Replication Management ALL : All volumes become selectable objects. LD Set Name : Volumes registered in the selected LD Set become selectable objects. Undefined Volumes not registered in the LD Set become selectable objects. : (v) Logical Disk Select the Logical Disk which you want to set. When you click the [Execute] button, the following message is displayed. Figure 3-10 Confirmation Screen Unpair Do one of the following to display the Unpair screen.
Chapter 3 Replication Management From the list, select a pair you want to unpair, and then click the [Execute] button. You can select multiple executable pairs and execute them in a batch. Unexecutable pairs cannot be selected. (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions.
Chapter 3 Replication Management [Execution Conditions] To Pair setting or Unpair, the following conditions must be satisfied. Conditions for Pair setting Volumes in which the pair setting is performed must satisfy the following conditions. (i) The volume capacities of MV and RV match. (ii) The specified RV is not set as RV for another pair. (iii) If the specified MV is set as MV for another pair, the maximum number of simultaneous pairs is not exceeded. (iv) The volume formats match.
Chapter 3 Replication Management RV unmounted by the ReplicationControl function from a business server or backup server of Windows may be set in the Not Ready state. In this case, even if the synchronous state of the pair is “separated”, the RV mode is kept in the Not Ready state.
Chapter 3 Replication Management 33..33..22 R Reepplliiccaattee When you perform Replicate for volumes with the pair setting, copy from MV to RV starts. [Operation Procedure] Do one of the following to display the Replicate screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Replicate].
Chapter 3 Replication Management For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Replicated Execute it for a volume in the Separate state. Restored Execute it for a volume in the Separate state. Being replicated by other pair Replicate is being executed in another layer. Separate is complete.
Chapter 3 Replication Management (iv) Copy Mode You can specify the copy control state in Replicate Execution and the Synchronous state at the same time as Replicate. The following copy modes can be specified. Radio Button (v) Description Synchronous Changes the copy control state to the foreground copy (Synchronous) mode. Semi-synchronous Changes the copy control state to the foreground copy (Semi-synchronous) mode. This can be specified for pairs in different disk arrays.
Chapter 3 Replication Management (vi) The activity state of the pair of the specified MV and the paired upper MV is not in the Restore state. (vii) The activity state of the pair of the specified RV and the paired lower RV is not in the Restore state. (viii) The disk array where the specified MV and RV are stored is not Freeze state. (ix) The disk array where the specified MV and RV are stored is monitored. (x) The RV has been unmounted from the host.
Chapter 3 Replication Management 33..33..33 S Seeppaarraattee If Separate is performed for paired volumes, MV is separated from RV and RV is made available. RV cannot be reused until Separate is completed. However, it can be used for Separate(immediate). [Operation Procedure] Do one of the following to display the Separate screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Separate].
Chapter 3 Replication Management (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information (ii) Measure Have Unpaired Execute it for a volume with a volume of the Synchronous state.
Chapter 3 Replication Management (iii) RV Use Start Time Determine when to make the RV available. Radio Button Description Separate End After Separate execution, the RV becomes available when the difference between the MV and RV contents has been reflected into the RV (Separate(completion)). Separate Start After Separate execution, the RV is immediately available while the difference between the MV and RV contents is being reflected into the RV (Separate(immediate)).
Chapter 3 Replication Management Figure 3-18 illustrates the execution conditions of Separate. (Each of (i) to (viii) in the figure corresponds to the respective number above.) (i) (ii) (iii) (iv) (v) (vi) (vii) Replication Target Disk Pair Setting Not in Restore execution Not in the Freeze state Disk array monitored MV is unmounted from the host. The specified MV is not registered in the AT-group. (viii) Separate is not being performed between the upper volume and the lower volume that are paired.
Chapter 3 Replication Management 33..33..44 R Reessttoorree When you perform Restore for volumes with the pair setting, copy from RV to MV starts. [Operation Procedure] Do one of the following to display the Restore screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Restore]. • Right-click in the Replication Information screen, point to [Volume Operation], and then select [Restore].
Chapter 3 Replication Management (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting.
Chapter 3 Replication Management (iii) Active Mode Specify a Restore operation mode. Radio Button RV Protection Description Performs restoration without reflecting the updated data of the MV into the RV. When the restoration is completed, Separate is automatically executed.
Chapter 3 Replication Management (vi) RV Status Specifies the access restrictions from the host until Restore is complete. Radio Button Description Not Ready Operations for the volume cannot be performed from the host. Read Only For the volume, only read can be performed from the host. * Care should be taken to specify Read Only. Restriction”. Refer to 2.6 “RV Access When you click the [Execute] button, the following message is displayed.
Chapter 3 Replication Management Figure 3-21 illustrates the execution conditions of Restore. (Each of (i) to (xiii) in the figure corresponds to the respective number above.) Target Pair RV MV Replication Target Disk Pair Setting Separated Semi-synchronous not allowed for the same disk array (viii) Not in the Freeze state (ix) Disk array monitored (x) MV and RV are unmounted from the host. (xi) The specified MV is not registered in the AT-group.
Chapter 3 Replication Management 33..33..55 S Suussppeenndd//R Reessuum mee C Cooppyy You can suspend and resume copy operation in the Replicate or Restore state. [Operation Procedure] Suspend Copy The Foreground Copy or Background Copy state is changed to the Suspend Copy state. Do one of the following to display the Suspend Copy screen.
Chapter 3 Replication Management (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting.
Chapter 3 Replication Management Figure 3-23 shows an example of the Resume Copy screen. Not selected Cannot be selected (i) Selected (ii) (iii) Figure 3-23 Example of Resume Copy Screen From the list, select a pair for which you want to perform the operation, and then click the [Execute] button. You can select multiple executable pairs and execute them in a batch. Unexecutable pairs cannot be selected.
Chapter 3 Replication Management Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Foreground Copy State Execute it for a volume in the Suspend state. Separate State Execute it for a volume in the Suspend state. Freeze Defreeze the Data Replication function and execute it again. MV Monitoring Suspended Change the disk array of MV to the Monitored state and execute it again.
Chapter 3 Replication Management [Execution Conditions] To perform operations of suspending/resuming copy, the following conditions must be satisfied. (i) The target MV is recognized by Replication Management as the Replication target disk. (ii) The target MV and RV are paired. (iii) The activity state of the target pair is Replicate or Restore. (iv) The Semi-synchronous Copy mode cannot be specified for pairs set in the same disk array.
Chapter 3 Replication Management 33..33..66 C Chhaannggee ttoo B Baacckkggrroouunndd C Cooppyy The copy control state is changed from the Replicate or Restore state to the Background Copy state. [Operation Procedure] Do one of the following to display the Change to Background Copy screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [Change to Background Copy].
Chapter 3 Replication Management Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting. Separate State Execute it for a volume in the Replicate state or Restore state. Already Background Copy Execute it for a volume in Foreground Copy. State Freeze Defreeze the Data Replication function and execute it again. MV Monitoring Suspended Change the disk array of MV to the Monitored state and execute it again.
Chapter 3 Replication Management Figure 3-28 illustrates the execution conditions of changes to Background Copy. (Each of (i) to (vi) in the figure corresponds to the respective number above.) (i) (ii) (iii) (iv) (v) (vi) Target Pair MV Figure 3-28 RV Replication Target Disk Pair Setting Replicate or Restore Not in the Freeze state Disk array monitored The specified MV is not registered in the AT-group.
Chapter 3 Replication Management 33..33..77 R RV VM Mooddee C Chhaannggee You can change the RV access restriction. [Operation Procedure] Do one of the following to display the RV Mode Change screen. • Select a volume in the Replication Information screen, click [Operation] on the menu bar of the Replication screen, point to [Volume Operation], and then select [RV Mode Change]. • Right-click in the Replication Information screen, point to [Volume Operation], and then select [RV Mode Change].
Chapter 3 Replication Management (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information (ii) Measure Have Unpaired Execute it for a volume with the pair setting.
Chapter 3 Replication Management When you click the [Execute] button, the following message is displayed. Figure 3-30 Confirmation Screen When it is performed for a volume in Replicate, Restore, or Separate execution, the following warning message is displayed and the change of the RV mode of the volume is cancelled. Figure 3-31 Warning Screen [Execution Conditions] To change the RV mode, the following conditions must be satisfied.
Chapter 3 Replication Management 33..33..88 FFoorrcceedd S Seeppaarraattee When a failure occurs in the connection between disk arrays and the normal Separate cannot be performed on MV and RV, you can use Forced Separate to instruct Separate to MV and RV individually. Forced Separate forcibly separates MV and RV and makes RV available. [Operation Procedure] Do one of the following to display the Forced Separate screen.
Chapter 3 Replication Management (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting.
Chapter 3 Replication Management Figure 3-34 is displayed when MV is not under the iSM. Figure 3-35 is displayed when RV is not under the iSM. After execution, perform Forced Separate for MV or RV not separated. Figure 3-34 Warning Screen for MV without under iSM Figure 3-35 Warning Screen for RV without under iSM When you click the [Yes] button, the following message is displayed.
Chapter 3 Replication Management [Execution Conditions] To perform Forced Separate, the following conditions must be satisfied. (i) The target volume is recognized by Replication Management as the Replication target disk. (ii) The target MV and RV are paired, or one of them is forcibly separated. (iii) The disk array where the specified MV and RV are stored is not in the Freeze state. (iv) The disk array where the specified volume is stored is monitored.
Chapter 3 Replication Management 33..33..99 FFoorrcceedd U Unnppaaiirr When a failure occurs in the disk array of MV or RV, monitoring is suspended and the normal Cancel Pair may not be performed. In such a case, you can use Forced Unpair to unpair the pairs for MV and RV separately. [Operation Procedure] Before performing Forced Unpair, you must separate MV and RV with Separate or Forced Separate. Do one of the following to display the Forced Unpair screen.
Chapter 3 Replication Management (i) Selected Volume List Displays the list of the pair (MV/RV) information selected in the Replication Information screen. Volumes whose Execution Result is “Unexecutable” cannot be selected because they do not satisfy the execution conditions. For the “Unexecutable” volumes, do the following by referring to the Unexecutable Information. Unexecutable Information Measure Have Unpaired Execute it for a volume with the pair setting.
Chapter 3 Replication Management If Forced Unpair is performed for either MV or RV, the replication operations will not function properly because inconsistency occurs in the recognized states of MV and RV. In this case, perform Forced Unpair for MV or RV for which Unpair is not performed. Figure 3-39 is displayed when MV is not under the iSM. Figure 3-40 is displayed when RV is not under the iSM.
Chapter 3 Replication Management [Execution Conditions] To perform Forced Unpair, the following conditions must be satisfied. (i) The target volume is recognized by Replication Management as the Replication target disk. (ii) The target MV and RV are paired, or one of them is forcibly unpaired. (iii) The target pair is in the Separated or Forced Separate state. (iv) The disk array where the specified MV and RV are stored is not in the Freeze state.
Chapter 3 Replication Management 33..33..1100 FFrreeeezzee//D Deeffrreeeezzee You can freeze or defreeze the Data Replication function of the disk array. [Operation Procedure] Do one of the following to display the Freeze/Defreeze screen. • Select the disk array in the configuration display area, click [Operation] on the menu bar of the Replication screen, point to [System Operation], and then select [Freeze/Defreeze].
Chapter 3 Replication Management [Execution Conditions] To perform Freeze/Defreeze, the following conditions must be satisfied. (i) The target disk array is recognized by Replication Management. (ii) The specified disk array is monitored. When you perform Freeze, no replication operations can be performed in the disk array. Refer to 2.8 “Freeze of Disk Arrays”. 33..33..1111 B Baacckkggrroouunndd C Cooppyy LLeevveell C Chhaannggee You can change the priority of Background Copy of the disk array.
Chapter 3 Replication Management (i) Background Copy Level Specifies the priority of copy operation when Background Copy is selected in Replicate and Restore. A higher priority results in faster copying for reflecting difference. (For more information, refer to 2.4 “Copy Control State”.) • Return Default Value Restores the default value of the disk array. • Change You can specify the priority of the disk array. When you click the [Execute] button, the following message is displayed.
Chapter 3 Replication Management 33..33..1122 C Coonnnneeccttiioonn S Sccrreeeenn The connection state of the volume is displayed. [Operation Procedure] Do one of the following to display the Volume Connection screen. y Select a volume in the Replication Information screen, point to [View] on the menu bar of the Replication screen, and then select [Connection Screen]. y Select a volume in the Replication Information screen, right-click it, and then select [Connection Screen].
Chapter 3 Replication Management (i) Disk Array Name Displays the name of the disk array where the volume exists. The disk array name of the selected volume is highlighted. (ii) Logical Disk Number, Format, Logical Disk Name Displays them in the form of “(logical disk number) format:logical disk name (or VAA)”. The logical disk number, format, and logical disk name of the selected volume is highlighted. (iii) Copy Progress Displays the progress of copy. This display disappears when copy is complete.
Chapter 3 Replication Management [Connection Display of Paired Volumes] Connections of volumes are displayed as pipes as shown below. During copy operation, the color of the original disk moves through the pipe.
Chapter 3 Replication Management [Differential Quantity of Volume/Transfer Rate] Displays the amount of difference and transfer rate during copy operation. The unit of the amount of difference is variable (e.g. KB, MB, GB), and the unit of transfer rate is fixed (MB/S). Example of Display (Replicate) Amount of Difference Transfer Rate After Replicate is complete When Replication is complete (Amount of Difference=0), Amount of Difference and Transfer Rate (MB/S) disappears.
Chapter 3 Replication Management In the pair connected by RemoteDataReplication, the remote disk array is not managed by iSM or, in a monitoring stop, may be displayed like the above. In the pair connected by RemoteDataReplication, when Remote Volume cannot be recognized from the host computer which Local Volume has connected by having performed Forced Unpair to Remote Volume etc., it may display like the above.
Chapter 3 Replication Management Example of Display 2: Separate during Replicate Replicate Execution Separate is executed. Separate Execution Turns to the layer color because Separate is complete. Separate is complete. [Others] You can perform the replication operations by right-clicking the volume in the Connection screen. For how to operate, refer to the items in 3.3. 3.3.2 “Replicate” 3.3.3 “Separate” 3.3.4 “Restore” 3.3.5 “Suspend/Resume Copy” 3.3.5 “Suspend/Resume Copy” 3.3.
Chapter 3 Replication Management 33..33..1133 C CS SV VO Ouuttppuutt ooff IInnffoorrm maattiioonn LLiisstt D Diissppllaayy The replication information, the disk array LINK Information, and the AT-group information for the specified disk array can be output to a file in CSV format. This CSV file can be used as a data for spreadsheet software. On the menu bar, do the following: • Click [File], and then click [CSV Output of Information List Display].
Chapter 3 Replication Management [CSV File Containing Information Display List] This section shows an example of the CSV file that is created by executing the CSV output of information display list. In this file, the information displayed on the screen is written in the format in which each item is separated by commas.
Chapter 3 Replication Management 33..33..1144 S Saavvee P Paaiirr S Seettttiinngg IInnffoorrm maattiioonn This function saves the pair setting information for the selected disk array to a file. On the menu bar, do the following: • Click [File], and then click [Save the Pair Setting Information]. Figure 3-49 shows an example of the Save Pair Setting Information screen.
Chapter 3 Replication Management Table 3-3 Item Number 1 Pair List Format Rules Syntax Description Pair Name List Identifier of this file. A space between characters is a half size. 2 MV DiskArrayName Name of the disk array where the Master Volume (MV) belongs. The maximum number of characters is 32. 3 MV OSType 4 MV ExVolName OS type of MV. Logical disk name of MV The maximum number of characters is 24. 5 RV DiskArrayName Name of the disk array where the Replication Volume (RV) belongs.
Chapter 3 Replication Management 33..33..1155 E Ennvviirroonnm meenntt S Seettttiinngg The interval to obtain disk array information is specified. It is the interval to obtain copy progress information in the screen display. On the menu bar, do the following: • Click [View], and then click [Environment Setting]. Figure 3-50 shows an example of the Environment Setting screen.
Chapter 3 Replication Management When you perform [Refresh], the following message is displayed. Figure 3-51 Warning Screen for Refresh 33..33..1177 R Reeccoorrdd S Sccrreeeenn IInnffoorrm maattiioonn The screen information of Replication Screen is recorded. The recorded information is reflected the next time the Replication Management screen is activated. On the menu bar, do the following: • Click [View], and then click [Record Screen Information].
Chapter 3 Replication Management 33..33..1188 D Diissppllaayy D Diisskk A Arrrraayy P Prrooppeerrttiieess The setting states of the device are displayed. Do the following: • Select a disk array in the configuration display area, click [View] on the menu bar, and then select [Properties]. • Select a disk array in the configuration display area, right-click it, and then select [Properties]. Figure 3-52 shows an example of the Disk Array Properties screen.
Chapter 3 Replication Management (iii) Replication Status Indicates whether the Data Replication function of the disk array is available. Display (iv) Description READY Indicates that it is operable. FREEZE Indicates that the Data Replication function is frozen due to a power down process of the disk array or acceptance of a Freeze instruction. Background Copy Level Displays the priority of Background Copy.
Chapter 3 Replication Management Figure 3-53 Example of Link Properties Screen The items indicate the following information (Refer to Figure 3-5 “Replication Link Information”). (i) Link Disk Array Name Indicates the identification name assigned to the linked disk array. (ii) Path Number Indicates the link path number of the selected link information. (iii) Director Number Indicates the replication director (host director for the 2400 and 2800 series) number of the selected link information.
Chapter 3 Replication Management (vii) Path State Display Description Normal Indicates the normal status. Offline Indicates that the link setting is unconfirmed during startup of the disk array. Freeze Indicates that the Data Replication function in the target disk array is frozen. Link Checking Indicates that the link status is being checked due to a failure of communication in the link. Fault Indicates that the link is invalid due to a failure of communication in the link.
Chapter 3 Replication Management 33..33..2200 D Diissppllaayy C Cooppyy FFaauulltt LLiisstt The copy fault list displays the pairs where a copy fault occurred. When a copy fault occurs, do the following to recover from the fault. * The pair registered in AT-group cannot be recovered from the copy fault list screen. * Unless you have acquired the volume information of the disk array that has a copy fault, no faults are displayed on the copy fault list screen. that has a copy fault.
Chapter 3 Replication Management (i) Status Status Description Fault Forcefully separated in the disk array due to a copy fault. Abnormal Suspend Forcefully suspended in the disk array due to a copy fault. (ii) Replicate Performs Replicate for the selected pair. This operation can be performed for a volume in the Fault state. (iii) Restore Performs Restore for the selected pair. This operation can be performed for a volume in the Fault state.
Chapter 4 Functions of ReplicationControl Chapter 4 Functions of ReplicationControl This chapter describes how to operate functions of the ReplicationControl that runs on the business server. The ReplicationControl functions include the creation and display of the volume list, replication operations, pair operations, and disk operations that are necessary for operating MV’s and RV’s in the system.
Chapter 4 Functions of ReplicationControl 44..11 C Co om mm maan nd dL Liisstt Table 4-1 shows the commands of the ReplicationControl. For details of each command, refer to the “Data Replication Command Reference”. Table 4-1 Command Name Operation The List of ReplicationControl Commands Description Target System Windows UNIX Volume List Creation/Display Associates logical disk (disk array side) information with system dependent information (server side) and displays the associated information.
Chapter 4 Functions of ReplicationControl 44..22 O Op peerraattiio on nT Tyyp peess To use ReplicationControl, the following operations can be selected. y Direct operation for a disk array This operation performs via FC directly a volume (MV or RV) connected to the server and recognized by OS. This operation type is the most basic type when replication operation is performed by a business server.
Chapter 4 Functions of ReplicationControl Table 4-2 Operation Form Command Name Direct Operation of Disk Array Operation Operation Linked with iSM iSMvollist Volume List Creation/Display { − iSMrc_replicate Replicate {*1 { iSMrc_separate Separate {*1 { { *1 { *1 iSMrc_restore Restore iSMrc_change Change Copy Control State { iSMrc_wait Wait for state { { iSMrc_query Paired Volume State Display { { iSMrc_sense Volume List Display { { iSMrc_ldlist Logical disk information
Chapter 4 Functions of ReplicationControl Business Server Backup Server ReplicationControl ReplicationControl Volume List Volume List FC Connection FC Connection RV MV RV MV AccessControl Figure 4-1 Direct Operation to MV or RV Volumes y A volume (control volume) is prepared to issue an I/O to a disk array, and operation is performed through the control volume.
Chapter 4 Functions of ReplicationControl Business Server Backup Server ReplicationControl ReplicationControl Volume List Volume List Control Volume FC Connection FC Connection MV RV RV MV AccessControl Figure 4-2 Operation Using a Control Volume In the ReplicationControl environment setting, you need to set DIRECT (issue an I/O to a disk array directly) for I/O issuing path to a disk array.
Chapter 4 Functions of ReplicationControl 44..22..22 O Oppeerraattiioonnss LLiinnkkeedd w wiitthh iiS SM M Operating ReplicationControl together with the replication management function of the iSM enables you to operate and maintain the data replication function, and to construct the environment, such as pairing and unpairing by commands, which have been conventionally conducted by the client of the iSM through GUI.
Chapter 4 Functions of ReplicationControl [Notes on Operation] For operations linked with the iSM, pay attention to the following. y In the operations linked with the iSM, replication is operated in the asynchronous state with operations.
Chapter 4 Functions of ReplicationControl 44..33 V Vo ollu um mee T Tyyp peess Types of volumes that are specified as operation targets for data replication commands are as follows: Table 4-3 shows the list of volume types. Table 4-3 List of Volume Types Type Description Identifier Target System Windows UNIX ld { { Logical disk name Specifies a logical disk name set on the disk array side. Mount point volume name Specifies a mount point volume name assigned to the volume by the system.
Chapter 4 Functions of ReplicationControl 44..44 R Reep plliiccaattiio on nO Op peerraattiio on nF Fiillee To perform the batch setting of multiple pairs by executing replication and pair operation commands, or to execute multiple commands for a specific pair, use the replication operation file. Using the replication operation file allows operation target pairs to be described in the file, managed and shared, thereby improving system operations and maintenance performance of the data replication.
Chapter 4 Functions of ReplicationControl 44..55 V Vo ollu um mee L Liisstt C Crreeaattiio on n//D Diissp pllaayy The function to create and display the volume list associates logical disk information (disk array side) with system dependent information (server side) and displays the associated information. Since it handles system dependent information, the function on the Windows system is different from the function on the UNIX system.
Chapter 4 Functions of ReplicationControl The iSMvollist command corresponds to the system information on the logical disk of the disk array that can be recognized from a business server and saves necessary volume information in the volume list. Only the volumes that have already been registered in the volume list can be specified when data replication or snapshot operation is performed. Therefore, you need to execute the iSMvollist command to create the volume list beforehand.
Chapter 4 Functions of ReplicationControl -ad option: Displays information only associated with a specified drive name or a path name of the NTFS folder. -ap option: Displays information only associated with specified logical disk numbers. -av option: Displays information only associated with specified mount point volume names. -ah option: Displays information only associated with specified HBT. If LUN is also specified, the system displays information only associated with specified HBT and LUN.
Chapter 4 Functions of ReplicationControl (iii) When the -a option is specified: Correspondence information about logical disks as shown below is listed. LDN LD Name HBT LUN Volume Name Path ldn ld_name hbt lun volume_name path Disk No.
Chapter 4 Functions of ReplicationControl (v) When the -p option is specified: Property information of the volume list as shown below is listed.
Chapter 4 Functions of ReplicationControl Disk Array disk_array_number Volume Information volume_number Description X.X.
Chapter 4 Functions of ReplicationControl 44..55..22 C Coom mm maanndd O Oppeerraattiioonnss ((U UN NIIX X)) On the UNIX system, by using the volume list creation and display function by means of the iSMvollist command, it is possible to obtain and display special file name, logical disk name, and associated OS type (hereafter, volume list) of the logical disks in the disk arrays.
Chapter 4 Functions of ReplicationControl special file. -vl option: Displays information only associated with specified disk arrays sorted by using logical disk number as the key. If a specific logical disk number is specified, the system displays information only associated with the specified logical disk number. -ve option: Displays information only associated with specified disk arrays sorted by using logical disk name as the key.
Chapter 4 Functions of ReplicationControl Description ldn: Logical disk number ld_name: Logical disk name vaa: VAA (Volume Absolute Address) type: OS type special_file_name: Special file name disk_array_name: Disk array name path: Whether to use a special file Usually this field is blank and nothing appears in this field, however, when data replication or snapshot is performed, if an error is detected in access to the special file, “B” appears.
Chapter 4 Functions of ReplicationControl (v) When the -p option is specified: Property information of the volume list as shown below is displayed.
Chapter 4 Functions of ReplicationControl Description X.X.
Chapter 4 Functions of ReplicationControl 44..55..33 G GU UII O Oppeerraattiioonnss ((W Wiinnddoow wss)) On the Windows system, the volume list creation and display function can be used via the GUI. The GUI functions include volume list display, selective display of disk arrays, and creation and update of the volume list. The function to define control volumes used for the business server to operate the data replication or snapshot function is also provided.
Chapter 4 Functions of ReplicationControl (iii) Toolbar buttons Toolbar Button Description Clicking this button has the same effect as selecting [Create/Update Volume List] from the menu. [Create/Update Volume List] Clicking this button has the same effect as selecting [Define Control Volume] from the menu. [Define Control Volume] Clicking this button has the same effect as selecting [CSV Output of Information List] from the menu.
Chapter 4 Functions of ReplicationControl (xiv) Disk Array Displays disk array names in the Volume List file. (xv) Classification Displays the type (volume attribute) of volumes regarding data replication and snapshot by obtaining from a disk array. The information items (vi) to (xiv) above are displayed by obtaining from the volume list, however, the information items (iv) and (xv) are displayed by obtaining from a disk array.
Chapter 4 Functions of ReplicationControl 44..55..33..11 S Sttaarrttiinngg//TTeerrm miinnaattiinngg V Voolluum mee LLiisstt D Diissppllaayy This section describes the procedures for starting and terminating the Volume List Display function. [Operation Procedure] Starting Volume List Display screen (1) Select [Start] of Windows → [Programs] ([All Programs] for Windows Server 2003) → [Storage Manager Volume List] → [Volume List Display]. (2) The Volume List Display screen appears.
Chapter 4 Functions of ReplicationControl 44..55..33..22 S Seelleeccttiinngg D Diisskk A Arrrraayy N Naam mee Click the pull-down button of disk array Selection Combo box on the screen of Volume List Display, and select the target disk array. The information of only the selected disk array is displayed. [Operation Procedure] (1) Select the target disk array from the disk array Selection Combo box on the screen of Volume List Display. (2) The volume information on the selected disk array is listed.
Chapter 4 Functions of ReplicationControl 44..55..33..33 C Crreeaattee//U Uppddaattee tthhee V Voolluum mee LLiisstt To update the Volume List, select [File] and then select [Create/Update Volume List] on the Volume List Display screen. [Operation Procedure] (1) Select [File] and then select [Create/Update Volume List] on the Volume List Display screen.
Chapter 4 Functions of ReplicationControl 44..55..33..44 C CS SV VO Ouuttppuutt ooff IInnffoorrm maattiioonn LLiisstt The information displayed on the Volume List Display screen is output as a CSV file and then saved. [Operation Procedure] Select [File] and then select [CSV Output of Information List] on the Volume List Display screen. The CSV Output of Information List screen appears. Figure 4-10 (1) CSV Output of Information List Screen Specify the save destination.
Chapter 4 Functions of ReplicationControl [File Example] The following example shows the CSV file that is output as the result of the CSV output of the information display list. Drive Letter/Path Name,Volume Name,Disk No.
Chapter 4 Functions of ReplicationControl 44..55..33..55 D Diissppllaayyiinngg P Prrooppeerrttyy IInnffoorrm maattiioonn ooff V Voolluum mee LLiisstt To check property information of the volume list, select [File] → [Properties] on the Volume List Display screen. [Operation Procedure] (1) To display property information, select [File] → [Properties] on the Volume List Display screen. (2) To return to the Volume List Display screen, click the [Close] button.
Chapter 4 Functions of ReplicationControl 44..55..33..66 V Viieew w//H Hiiddee TToooollbbaarr To select whether to view or hide the toolbar, specify [View] → [Toolbar] on the Volume List Display screen. View Figure 4-14 Viewing Toolbar Hide Figure 4-15 Hiding Toolbar 44..55..33..77 V Viieew w//H Hiiddee S Sttaattuuss B Baarr To select whether to view or hide the status bar, specify [View] → [Status Bar] on the Volume List Display screen.
Chapter 4 Functions of ReplicationControl 44..55..33..88 U Uppddaattiinngg D Diissppllaayy IInnffoorrm maattiioonn To update the information of the Volume List file, select [View] and then select [Update Display Information] on the Volume List Display screen. The Volume List file contents are obtained and the Volume List Display screen is automatically updated. 44..55..33..
Chapter 4 Functions of ReplicationControl Display items on the Define Control Volume screen are described below. (i) Selected Volume List Lists already-registered control volumes. : (ii) Displays a logical disk selected as a control volume. Candidate Volume List Lists candidates of logical disks that can be registered as a control volume. : Displays logical disks that can be registered as a control volume.
Chapter 4 Functions of ReplicationControl Figure 4-19 Register Control Volume Figure 4-20 Change Control Volume 136
Chapter 4 Functions of ReplicationControl When you try to change a control volume that has already been registered in [Candidate Volume List], the following confirmation screen appears. To change the control volume to the logical disk selected from [Selected Volume List], click the [Yes] button. To return to the Define Control Volume screen without update, click the [No] button.
Chapter 4 Functions of ReplicationControl (3) When you click the [OK] button on the Define Control Volume screen, the message for confirming whether to save the definition information appears. Figure 4-23 Save Confirmation Screen of Define Control Volume Screen When you click the [Yes] button for the confirmation, the definition information is saved and the completion message appears. To return to the Define Control Volume screen, click the [No] button.
Chapter 4 Functions of ReplicationControl Figure 4-25 (4) Cancel Confirmation Screen of Define Control Volume Screen Update the volume list to reflect the updated definition information to the volume list. Select [File] → [Create/Update Volume List] from the Volume List Display screen to create and update the volume list, and reflect the saved definition information of the control volume to the volume list for registration.
Chapter 4 Functions of ReplicationControl 44..66 R Reep plliiccaattiio on nO Op peerraattiio on nss Replication operation commands provide a function to operate volumes by using disk array’s Data Replication function as well as a function to obtain and display a variety of information. 44..66..11 R Reepplliiccaattee C Coom mm maanndd For Replicate, the iSMrc_replicate command is used. By executing the iSMrc_replicate command, copy from MV to the paired RV starts.
Chapter 4 Functions of ReplicationControl (3) Specifying the Copy Control state (-cpmode) You can specify the Copy Control state during Replicate execution or in the Synchronous state. The following can be specified. y Synchronous Copy (-cpmode sync) Changes the Copy Control state to the Synchronous Copy mode. y Semi-synchronous Copy (-cpmode semi) Changes the Copy Control state to the Semi-synchronous Copy mode. This can be specified for pairs in different disk arrays.
Chapter 4 Functions of ReplicationControl [Displayed Information] The iSMrc_replicate command displays messages when Replicate starts, during execution, and when Replicate ends. On the Windows system [Start message] Replicate Start MV:disk_number YYYY/MM/DD hh:mm:ss ld_name type ld_name type volume_name path RV:disk_number volume_name path [Execution message] Replicating.....
Chapter 4 Functions of ReplicationControl On the UNIX system [Start message] Replicate Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [Execution message] Replicating..... [End message] Replicate Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description The execution message and the end message appear only when -wait has been specified to wait for the Copy completion state.
Chapter 4 Functions of ReplicationControl (ix) The Activity State of the pair of the specified MV and the paired upper MV is not in the Restore state. (x) The Activity State of the pair of the specified RV and the paired lower RV is not in the Restore state. (xi) The Semi-synchronous Copy mode cannot be specified for paired volumes set in the same disk array. The Semi-synchronous Copy mode can be specified only for paired volumes set in different disk arrays.
Chapter 4 Functions of ReplicationControl (ix) Not in the Restore State Target Pair MV RV MV RV MV (x) Not in the Restore State Target Pair MV RV (vii) Not in the Restore State RV (i) Pair setting (ii) MV or RV has been registered in the volume list. (iii) The volume list is not being created or updated (iv) RV has been unmounted. (v) Disk array is not in the Freeze state. (vi) Separated (xi) Semi-synchronous Copy cannot be performed on the same disk array.
Chapter 4 Functions of ReplicationControl 44..66..22 S Seeppaarraattee C Coom mm maanndd For Separate, the iSMrc_separate command is used. The iSMrc_separate command separates RV from MV and makes RV available from the system. MV and RV must be set as a pair. [Main Options] For iSMrc_separate command, you can specify the following options regarding the Separate operation. (1) Specifying paired volumes Specify MV and RV volumes.
Chapter 4 Functions of ReplicationControl y No Wait (-nowait) Performs only a Separate start instruction and terminates the command. You can check the termination of the command by the iSMrc_query or iSMrc_wait command. (4) Forced Separate (-force) If a fault occurs in the connection between disk arrays and the normal Separate cannot be performed for MV and RV, you can specify the -force option to instruct Separate to MV and RV separately.
Chapter 4 Functions of ReplicationControl [Displayed Information] The iSMrc_separate command displays messages when Separate starts, during execution, and when Separate ends. On the Windows system [Start message] Separate Start MV:disk_number YYYY/MM/DD hh:mm:ss ld_name type ld_name type volume_name path RV:disk_number volume_name path [Execution message] Separating...
Chapter 4 Functions of ReplicationControl On the UNIX system [Start message] Separate Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [Execution message] Separating... [End message] Separate Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description The execution message and the end message appear only when -wait has been specified to wait for the Separated state.
Chapter 4 Functions of ReplicationControl (ix) When an LVM volume group or a VxVM disk group is specified, the target volume group or disk group must be active (UNIX only). (x) When specifying the combination of an LVM volume group or a VxVM disk group with a special file name (logical disk name), you must specify the same number of logical volumes that make up the volume group or disk group as MV (RV) on the special file name (logical disk name) side.
Chapter 4 Functions of ReplicationControl 44..66..33 R Reessttoorree C Coom mm maanndd For Restore, the iSMrc_restore command is used. By executing the iSMrc_restore command, copy from RV to the paired MV starts. Before Restore is performed, MV and RV to be specified must be paired beforehand. In addition, MV and RV to be specified must be registered in the volume list (created by iSMvollist) beforehand.
Chapter 4 Functions of ReplicationControl (3) Specifying the Copy Control state (-cpmode) You can specify the Copy Control state in Restore Execution and the Synchronous state. y Synchronous Copy (-cpmode sync) Changes the Copy Control state to the Synchronous Copy mode. y Semi-synchronous Copy (-cpmode semi) Changes the Copy Control state to the Semi-synchronous Copy mode. This can be specified for paired volumes in different disk arrays.
Chapter 4 Functions of ReplicationControl y RV protection specified (-mode protect) Performs Restore without reflecting the updated data of the MV into the RV. When Restore is completed and the Synchronous State is placed, Separate is automatically executed and then the state changes to Separated State. y According to the default setting (-mode default) On the Windows system, the system follows the MODE specification in the replication operation option setting file.
Chapter 4 Functions of ReplicationControl Description The execution message and the end message appear only when -wait has been specified to wait for the Synchronous State (rst/sync). If you do not want the execution message to appear, change the RPL_WAITMSG setting in the replication operation option setting file. For information about the replication operation option setting file, refer to the “Data Replication Command Reference”.
Chapter 4 Functions of ReplicationControl [Execution Conditions] To perform Restore, the following conditions must be satisfied. (i) The target MV and RV are paired. (ii) The target MV or RV has been registered in the volume list. (iii) The volume list is not being created or updated. (iv) Both MV and RV are unmounted from the system. (v) The disk array where the specified MV and RV are stored is not in the Freeze state. (vi) The Activity State of the target pair is Separate.
Chapter 4 Functions of ReplicationControl Figure 4-28 illustrates the execution conditions of Restore. (i) (ii) (ix) Separated Target Pair MV RV (iii) RV MV RV MV (iv) (v) (x) Separated (vi) (xi) Target Pair (xii) MV RV Pair setting MV or RV has been registered in the volume list. The volume list is not being created or updated. Both MV and RV have been unmounted. Disk array is not in the Freeze state. Separated Semi-synchronous Copy cannot be performed for the same disk array.
Chapter 4 Functions of ReplicationControl 44..66..44 C Cooppyy C Coonnttrrooll S Sttaattee C Chhaannggee C Coom mm maanndd For changing the Copy Control state, the iSMrc_change command is used. You can use option specification of the iSMrc_change command to perform the Copy Control state change in the Replicate or Restore state. Before the Copy Control state is changed, MV and RV to be specified must be paired beforehand.
Chapter 4 Functions of ReplicationControl Table 4-5 Change Option Relations of Copy Control State sync (synchronization) semi (semisynchronization) bg (background) suspend (suspend) resume (resume) sync (synchronization) × × { { ∆ semi (semi-synchronization) × × { { ∆ bg (background) { { ∆ { { suspend (suspend) { { { ∆ { State before Change {: The state can be changed. ∆: The state can be changed, but the Copy Control state cannot be changed. ×: The state cannot be changed.
Chapter 4 Functions of ReplicationControl On the UNIX system [Start message] Change Start YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type [End message] Change Normal End YYYY/MM/DD hh:mm:ss MV:special_file_name ld_name type RV:special_file_name ld_name type Description YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day special_file_name: Special file name ld_name: Logical disk name type: OS type Hour Minute Second) [Execution Conditions] To pe
Chapter 4 Functions of ReplicationControl Figure 4-29 illustrates the execution conditions of operations regarding the Copy Control state. (i) (ii) Target Pair MV RV (iii) (iv) (v) (vi) (vii) (viii) Figure 4-29 Pair setting MV or RV has been registered in the volume list. The volume list is not being created or updated Disk array is not in the Freeze state. In the Replicate or Restore state Semi-synchronous Copy cannot be performed in the same disk array.
Chapter 4 Functions of ReplicationControl 44..66..55 W Waaiitt C Coom mm maanndd Use the iSMrc_wait command to wait for Synchronous State (rpl/sync), Synchronous State (rst/sync), or Separated State. A pair of MV and RV must be specified as the target volumes beforehand. The MV and RV to be specified must be registered in the Volume List (created by the iSMvollist).
Chapter 4 Functions of ReplicationControl replication operation option setting file. On the UNIX system, the default value can be specified by using the RPL_WATCHDEV environment variable. For details of each setting, refer to the “Data Replication Command Reference”. (4) Paired-volume state monitoring time limit (-limit) You can specify a time limit for stopping the monitoring of the paired-volume state.
Chapter 4 Functions of ReplicationControl activity_state: Activity State of the paired volumes for which the wait command is completed Replicate: Synchronous State (rpl/sync) Restore: Synchronous State (rst/sync) Separate: Separated (including the Separated state accompanied by completion of Restore(protect)) YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) disk_number: Physical disk number ld_name: Logical disk name type: OS type volume_name: Mount point volume name
Chapter 4 Functions of ReplicationControl [Execution Conditions] To execute the wait command, the following conditions must be satisfied: (i) The target MV and RV are paired. (ii) The target MV or RV has been registered in the volume list. (iii) The volume list is not being created or updated. (iv) The disk array where the specified MV and RV are stored is not in the Freeze state. (v) Specifying a volume of a dynamic disk or a GPT-format partition disk is not allowed (Windows only).
Chapter 4 Functions of ReplicationControl 44..66..66 R Reepplliiccaattiioonn S Sttaattee D Diissppllaayy C Coom mm maanndd To display the replication state, the iSMrc_query command is used. As the target volume, MV and RV to be specified must be paired beforehand. In addition, MV and RV to be specified must be registered in the volume list (created by iSMvollist).
Chapter 4 Functions of ReplicationControl Synchronous State sync Copy Control State copy Start Time YYYY/MM/DD hh:mm:ss End Time YYYY/MM/DD hh:mm:ss Separate Diff separate_diffsize Copy Diff copy_diffsize RV Access rvacc Previous Active prev_state Description disk_number: Physical disk number ld_name: Logical disk name type: OS type volume_name: Mount point volume name path: Drive letter or path name mounted in the NTFS folder activity: Activity State sync: Pair
Chapter 4 Functions of ReplicationControl Previous Active prev_state Description special_file_name: Special file name ld_name: Logical disk name type: OS type activity: Activity State sync: Paired operation state copy: Copy Control State Start Time: Operation start time ( varies) End Time: Operation end time ( varies) separate_diffsize: Difference of copy occurred in the Separate state copy_diffsize: Difference of copy occurred in the Replicate or Restore
Chapter 4 Functions of ReplicationControl Target Pair MV RV (i) (ii) (iii) (iv) Pair setting MV or RV has been registered in the volume list. The volume list is not being created or updated The disk is not a dynamic disk or GPT-formatted partition disk.
Chapter 4 Functions of ReplicationControl 44..66..77 S Sppeecciiffiicc V Voolluum mee N Naam mee D Diissppllaayy C Coom mm maanndd To carry out a specific volume name display, the iSMrc_sense command is used. The volume to be specified must be registered in the volume list (created by iSMvollist). [Main Options] The iSMrc_sense command enables the specification of the following options: (1) Specifying volumes Specify the target volume.
Chapter 4 Functions of ReplicationControl attribute: Logical disk attribute for the data replication and snapshot functions Displays only when the -attr option is specified. link_status: Link state of the link-volume Displays only when the -attr option is specified. When the target volume is not a link-volume, “-” (hyphen) appears.
Chapter 4 Functions of ReplicationControl Figure 4-32 shows execution conditions for displaying a specific volume name. Target (i) (ii) (iii) The target volume or the volume paired with the target volume has been registered in the volume list. The volume list is not being created or updated The disk is not a dynamic disk or GPT-formatted partition disk.
Chapter 4 Functions of ReplicationControl 44..77 P Paaiirr S Seettttiin ng g aan nd dU Un np paaiirr O on nss Op peerraattiio Pair operation commands make functions available for listing logical disks, pair setting and unpairing. Pair operation enables data replication that changes or switches RVs dynamically. 44..77..11 LLooggiiccaall D Diisskk IInnffoorrm maattiioonn D Diissppllaayy C Coom mm maanndd To perform logical disk information display, the iSMrc_ldlist command is used.
Chapter 4 Functions of ReplicationControl [Displayed Information] (1) When the -a option or the -de option is specified: Logical disk information as shown below is listed. Receiving...
Chapter 4 Functions of ReplicationControl Description Receiving... Message indicating that data is being received. During a joint operation with replication management, this message is displayed until data has been received. While data is being received, the “.” character is updated. disk_array_name Disk array name management Identifies whether the system recognizes the disk array.
Chapter 4 Functions of ReplicationControl 44..77..22 P Paaiirr//U Unnppaaiirr C Coom mm maanndd To execute pair setting or unpair, the iSMrc_pair command is used. The iSMrc_pair command sets and unpairs specified paired MV and RV. If a failure occurred on the MV side or RV side disk array and the regular unpairing becomes impossible, Forced Unpair can be performed. [Main Options] The iSMrc_pair command enables the specification of the following option regarding pair setting and unpairing.
Chapter 4 Functions of ReplicationControl (3) Forced Unpair (-force) If the regular unpairing becomes impossible due to a failure occurred in the connections between disk arrays and the like, it is possible to perform Forced unpair for MV and RV individually by specifying the -force option. You can specify one of the following as a Forced Unpair target. y Perform Forced Unpair for both MV and RV. (-force all) y Perform Forced Unpair only for MV. (-force mv) y Perform Forced Unpair only for RV.
Chapter 4 Functions of ReplicationControl (xi) The volume list is not being created or updated. (xii) Specifying a volume of a dynamic disk or a GPT-format partition disk is not allowed (Windows only). (xiii) The iSM dedicated special file is not being created (HP-UX version UNIX only). The above execution conditions (ii), (xi), (xii), and (xiii) are not applicable when conducting a joint operation with the iSM (replication management).
Chapter 4 Functions of ReplicationControl 44..88 D Diisskk A Arrrraayy O Op peerraattiio on nss The disk array operation command provides the function of displaying information on the replication function of a disk array. 44..88..11 C Coom mm maanndd ffoorr D Diissppllaayyiinngg IInnffoorrm maattiioonn oonn tthhee R Reepplliiccaattiioonn FFuunnccttiioonn To display information on the replication function of a disk array, use the iSMrc_arrayinfo command.
Chapter 4 Functions of ReplicationControl [Displayed Information] (1) When the -dinfo option is specified Information on the replication function of a disk array is displayed as shown below.
Chapter 4 Functions of ReplicationControl Description disk_array_name: Name of the disk array to link to link_number: Link number Number of a disk array to link to (link number), beginning with 0 path_number: Path number Connection number for each of disk arrays to link to, beginning with 0 path_state: Path status Indicates the connection status for each path indicated by the path number.
Chapter 4 Functions of ReplicationControl 44..99 D Diisskk O Op peerraattiio on nss The disk operation function, which functions only on the Windows system, enables disks to be controlled and operated so as to operate the data replication and snapshot functions on the Windows system. Disk operation commands provide functions necessary for Windows disk operation linking with the replication operation commands or snapshot operation commands rather than a function that replaces Windows “Disk Management”.
Chapter 4 Functions of ReplicationControl Description YYYY/MM/DD hh:mm:ss: Start/End time (Year Month Day Hour Minute Second) disk_number: Physical disk number ld_name: Logical disk name type: OS type volume_name: Mount point volume name path: Drive letter or path name mounted on the NTFS volume folder accessed by users [Execution Conditions] To perform Flush, the following conditions must be satisfied. (i) The target volume is registered in the volume list.
Chapter 4 Functions of ReplicationControl 44..99..22 V Voolluum mee M Moouunntt C Coom mm maanndd To carry out a volume mount, the iSMrc_mount command is used. The iSMrc_mount command associates volumes (partitions) and file systems. Mounting allows volumes to be used as file systems (local disks such as C: and D:) on the Windows system. When the iSMrc_umount command unmounts a volume that is set in the Not Ready state, release the Not Ready state and mount the volume.
Chapter 4 Functions of ReplicationControl volume_name: Mount point volume name path Drive letter or path name mounted on the NTFS volume folder accessed by users iSM13220: Setting drive letter (drive:) (volume_name) has succeeded. Message output when a drive letter or an NTFS folder name is set [Execution Conditions] To perform Mount, the following conditions must be satisfied. (i) The target volume is registered in the volume list.
Chapter 4 Functions of ReplicationControl 44..99..33 V Voolluum mee U Unnm moouunntt C Coom mm maanndd To unmount a volume, the iSMrc_umount command is used. The iSMrc_umount command cancels the association of volumes (partitions) with file systems. Unmounting a volume flushes the file system buffer of the specified volume thoroughly. When access is made to the file system of the unmounted volume, the Windows system mounts the volume automatically. operation is disabled.
Chapter 4 Functions of ReplicationControl [End message] Umount Normal End disk_number YYYY/MM/DD hh:mm:ss ld_name type volume_name path Description iSM13221: Resetting drive letter (drive:) (volume_name) has succeeded.
Chapter 4 Functions of ReplicationControl 44..99..44 D Diisskk S Siiggnnaattuurree O Oppeerraattiioonn C Coom mm maanndd For the disk signature operations, the iSMrc_signature command is used. A disk signature is system information used for identifying the disk on the Windows system. Windows system, two disks with the same signature cannot be used in the same system. On the For example, Data replication automatically avoids the same disk signature when MV and RV are synchronized.
Chapter 4 Functions of ReplicationControl [Displayed Information] The following information is displayed in the signature information list of the iSMrc_signature command. [Displayed information] Disk Disk Array Name No.
Chapter 4 Functions of ReplicationControl 44..99..55 D Deevviicceess S Sccaann C Coom mm maanndd To scan devices, the iSMrc_scan command is used. Executing the iSMrc_scan command scans devices and lets the system recognize available devices. When the system is starting up with the devices not connected to the system or in “Not Ready” state, the system cannot recognize those devices.
Index disk array ..................................................................... 33 disk array icon ............................................................. 29 disk array information display ........................... 104, 106 disk array link information screen ............................... 36 disk array operation command................................... 178 disk array operations.................................................. 178 disk array properties .....................................
I O I/O issuing path ......................................................... 108 interval to obtain disk array information ..................... 95 iSMrc_arrayinfo ........................................................ 106 iSMrc_change............................................ 104, 106, 157 iSMrc_flush ............................................... 104, 106, 181 iSMrc_ldlist ............................................... 104, 106, 172 iSMrc_mount.............................................
Restore State................................................................ 15 resume copy........................................................... 63, 64 RO ............................................................................... 20 rRV................................................................................ 8 RV ................................................................................. 1 RV access restriction ............................................. 20, 71 RV mode ...........
