HP StorageWorks XP24000/XP20000 Snapshot User Guide Abstract This guide explains how to use HP StorageWorks XP Snapshot Software to create space-efficient point-in-time copies of data volumes on an HP StorageWorks XP24000/XP20000 storage system. Topics include creating, monitoring, and troubleshooting snapshot pools, virtual volumes, and copy pairs.
© Copyright 2007, 2011 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license. The information contained herein is subject to change without notice.
Contents 1 Overview of HP StorageWorks XP Snapshot Software......................................6 XP Snapshot............................................................................................................................6 Features..................................................................................................................................6 Benefits................................................................................................................................
Installing and Uninstalling XP Snapshot.....................................................................................42 Installing XP Snapshot........................................................................................................42 Uninstalling XP Snapshot....................................................................................................42 Starting XP Snapshot.............................................................................................................
Subscription service..........................................................................................................116 Documentation Feedback..................................................................................................116 Related information...............................................................................................................116 Websites....................................................................................................................
1 Overview of HP StorageWorks XP Snapshot Software This chapter provides an overview of XP Snapshot and describes the features and benefits of XP Snapshot.
• Improves operational efficiency by allowing multiple processes to run in parallel with access to the same information. • Allows disk space to be used efficiently through volume snapshots rather than full-copy clones, which helps maximize disk space. Differentiation from HP StorageWorks XP Business Copy Software XP Business Copy differs from XP Snapshot in that it creates physically separate copies of the data; no portion is shared between primary and secondary volumes.
2 About XP Snapshot Operations This chapter describes the volumes used by XP Snapshot and the functions of XP Snapshot. • “XP Snapshot Components” (page 8) • “XP Snapshot Operations” (page 9) • “Status of the XP Snapshot Pairs” (page 14) • “Copy Threshold Option” (page 25) • “Interoperability with Other Products and Functions” (page 26) XP Snapshot Components A system using XP Snapshot usually contains the following components.
XP Business Copy license capacity includes: • XP Snapshot P-VOLs • XP Snapshot pool-VOLs • XP Business Copy P-VOLs • XP Business Copy S-VOLs • XP Business Copy reserved volumes These volumes are called used volumes. When determining how much license capacity to purchase, ensure that there will be enough licensed capacity for these used volumes. You must limit the total capacity of the used volumes so that it will be equal to or less than the licensed capacity.
In Figure 2 (page 9), Data A is stored in some part of the P-VOL of an XP Snapshot pair. When the host requests an update of Data A to Data B, XP Snapshot will copy Data A to the pool volume in the pool before the P-VOL is updated. After the copy operation of Data A has completed, Data B will be written to the part where Data A was stored in P-VOL, and the P-VOL will be updated. From the V-VOL, you can access Data B in the P-VOL and Data A in the pool-VOL.
You need to create a pool when you use XP Snapshot. Pool-VOLs registered in a pool can be added but cannot be deleted. In addition, all snapshot data in the pool must be deleted to delete the pool itself. WARNING! The capacity of a pool is equal to the total capacity of the pool-VOLs registered in the pool. The status of the XP Snapshot pair will be PSUE (status when failure occurred) when the usage rate of the pool exceeds the capacity of the pool as a result of writing data in the volume of that pair.
Creation of an XP Snapshot Pair An XP Snapshot pair uses a V-VOL as its S-VOL. Therefore, you need to create a V-VOL before creating an XP Snapshot pair. In an XP Snapshot pair, up to 64 S-VOLs can be specified for a P-VOL. CAUTION: When you create an XP Snapshot pair, you decide which pool will be used by the pair. If you create two or more XP Snapshot pairs that share the same P-VOL, you need to specify the same pool for these pairs.
Figure 4 Overview of Storing XP Snapshot Data by a Consistency Group When an XP24000/XP20000 Disk Array accepts the command from RAID Manager, which requests storing the data by a consistency group (1 in Figure 4 (page 13)), all status of the XP Snapshot pairs in the corresponding consistency group will change to PSUS (2 in Figure 4 (page 13)).
• Delete the XP Snapshot pair itself. • Delete only the snapshot data. When an XP Snapshot pair is deleted, not only is the snapshot data stored in the pool deleted, but also the relationship between the P-VOL and the S-VOL will be released. If only the snapshot data is deleted, the relationship between the P-VOL and the S-VOL is maintained. When only the snapshot data is deleted, the snapshot ID of the deleted snapshot data can be assigned to the newly stored snapshot data of the XP Snapshot pair.
Figure 5 XP Snapshot Pair Status Transition 1. 2. 3. 4. If a volume is not assigned to an XP Snapshot pair, its status is SMPL. Issue the paircreate command on the SMPL volume to create an XP Snapshot pair. When you create the first pair for the P-VOL, the pair status changes to COPY, and then the pair status changes to PAIR when the operation completes. If you specify a volume which is already paired with one or more S-VOLs as the P-VOL to create another pair, the pair status will not change to COPY.
6. the pair status changes to COPY(RS-R). When the operation completes, the pair status changes to PAIR. A pool can contain only a predefined amount of data. If the total capacity of the snapshot data in the pool exceeds the pool capacity, the pair status changes to PSUE. The pair status also changes to PSUE when a failure occurs while restoring the pair or when the usage rate of the pool reaches 100 percent. The pair status may change to PSUE when the failure occurs during a process other than restoring.
Table 3 Pair Statuses and the Results of the RAID Manager Commands (continued) Pair Status RAID Manager Command paircreate paircreate −split pairsplit pairresync pairresync -restore pairsplit -S pairsplit -E PSUS / PFUS No NOP NOP Yes Yes Yes No SMPL(PD) No No No No No NOP No COPY(RS) NOP No No NOP NOP No No COPY(RS-R) NOP No No NOP NOP No No PSUE No No Yes* No Yes NOP No Yes: The command executes the process and ends normally.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 9702 paircreate When attempting to create multiple XP Snapshot pairs by specifying multiple S-VOLs for one P-VOL, you specified a pool ID that was different from the one being used by existing pairs. As a result, new XP Snapshot pairs cannot be created.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 9721 paircreate pairsplit pairresync pairresync -restore Because either XP Snapshot or XP Business Copy is not installed, the command ends abnormally. 9723 All commands Because no additional shared memory (FCV2, TPF, Extension is available, the command ends abnormally.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB 20 RAID Manager Command Cause of Error 9732 pairresync -restore When the XP Snapshot P-VOL and XP Continuous Access Journal P-VOL share the volume, the status of the XP Continuous Access Journal pair is other than PSUS or PSUE. Therefore, the XP Snapshot pair cannot be restored.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 9746 paircreate Because you specified a pool-VOL as the XP Snapshot S-VOL, the pair cannot be created. 9747 paircreate Because you specified the XP Continuous Access P-VOL as the XP Snapshot S-VOL, the XP Snapshot pair cannot be created.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB 9757 RAID Manager Command All commands Cause of Error Because you specified the XP Auto LUN source volume as the XP Snapshot P-VOL, the command ends abnormally. For information on using XP Auto LUN, contact HP technical support (see “Contacting HP” (page 116)). 9758 All commands Because you specified the XP Auto LUN target volume as the XP Snapshot P-VOL, the command ends abnormally.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 976e pairresync When XP Snapshot P-VOL and XP Continuous Access S-VOL share the volume, the status of the XP Continuous Access pair is COPY. Therefore, the snapshot data cannot be stored. 976e pairsplit When the XP Snapshot P-VOL and XP Continuous Access S-VOL share the volume, the status of the XP Continuous Access pair is COPY.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 977a paircreate, pairsplit When the XP Snapshot P-VOL and XP Business Copy P-VOL share the volume, the XP Business Copy pair was in the process of resynchronization. Therefore, the command ends abnormally. 977b paircreate, pairsplit When the XP Snapshot P-VOL and XP Business Copy S-VOL share the volume, the status of the XP Business Copy pair is other than PSUS.
Table 4 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB 978a RAID Manager Command paircreate Cause of Error Because one of the following cases happened, the XP Snapshot pair cannot be created by specifying the consistency number. • The specified consistency group number is in use for XP Business Copy Software. • The number of pairs has already exceeded the maximum number of pairs that can be created for one consistency group.
The Copy Threshold option is effective only when the load of the storage system is heavy. When the Copy Threshold option is in effect, all the copy processing by the restore operation stops. For information about the setting of the Copy Threshold option, call HP technical support. Copy operations that are stopped by the Copy Threshold option will resume when the load of the storage system becomes light.
• You need Data Retention Utility to set the Read Only attribute, the Protect attribute, or S-VOL Disable. For details, see the HP StorageWorks XP24000/XP20000 Data Retention Utility User Guide. • You need RAID Manager to set the Zero Read Capacity attribute or the Invisible attribute. For details, see the HP StorageWorks XP RAID Manager User Guide.
(page 29) show the relationship between the XP Snapshot pair status and XP Business Copy operations for shared volumes. For detailed information about XP Business Copy pair status and operations, see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide. • Because the XP Snapshot S-VOL uses the data in the P-VOL, XP Business Copy's quick backward pairresync operation (Quick Restore) is not allowed.
Table 8 XP Business Copy Operations for Shared XP Snapshot P-VOL/XP Business Copy P-VOL XP Business Copy Operations XP Snapshot Pair Status COPY PAIR PSUS SMPL (PD) COPY (RS) COPY (RS-R) PSUE Creating pairs (paircreate) Yes Yes Yes Yes Yes No Yes Creating and splitting pairs (paircreate −split) Yes Yes Yes Yes Yes No Yes Splitting pairs (pairsplit) Yes Yes Yes Yes Yes No Yes Forward pair resynchronization (pairresync) Yes Yes Yes Yes Yes No Yes Normal backward pair res
XP Continuous Access or XP Continuous Access Journal “XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal P-VOL” (page 30) and “XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL” (page 30) show the relationship between the XP Continuous Access or XP Continuous Access Journal pair status and XP Snapshot operations when the XP Snapshot P-VOL is shared with an XP Continuous Access or XP Continuous
Table 11 XP Snapshot Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL (continued) XP Snapshot Operations XP Continuous Access / XP Continuous Access Journal Pair Status COPY PAIR PSUS PSUE SSWS1 Suspending Deleting Deleting snapshot data (pairresync) Yes Yes Yes Yes Yes Yes Yes Deleting pairs (pairsplit −S) Yes Yes Yes Yes Yes Yes Yes Yes: Operation is allowed. No: Operation is not allowed (command rejected).
Table 13 XP Continuous Access/XP Continuous Access Journal Operations for Shared XP Snapshot P-VOL/XP Continuous Access or XP Continuous Access Journal S-VOL (continued) XP Continuous Access / XP XP Snapshot Pair Status Continuous Access Journal COPY PAIR PSUS Operations SMPL (PD) COPY (RS) COPY (RS-R) PSUE Deleting pairs (pairsplit −S) Yes Yes Yes Yes Yes Yes Yes Switching to remote site (horctakeover) Yes Yes Yes Yes Yes No Yes Yes: Operation is allowed.
3 Preparing for XP Snapshot Operations This chapter describes the requirements for using XP Snapshot, the installation procedure for XP Snapshot, and calculation of the number of pairs that XP Snapshot can create. Read this chapter before you start the operation of XP Snapshot.
Table 15 S-VOL Requirements Item Requirement Volume type V-VOL You cannot specify the following volumes as XP Snapshot S-VOLs. • Volumes used as S-VOLs of XP Snapshot pairs • Volumes used by a pair or migration plan of another program product NOTE: A LUSE S-VOL must be paired with a P-VOL of the same size and the same structure.
Table 16 Pool-VOL Requirements (continued) Item Requirement Maximum number 8,192 However, the maximum number of pool-VOLs that can be registered in each pool is 1024. That is, you can create up to 128 pools in one storage system. In addition, the volume already registered as a pool-VOL in a pool cannot be registered in another pool.
Calculating the Maximum Number of Pairs The number of XP Snapshot pairs that can be created for a storage system depends on the number of differential tables, the capacity of shared memory for the V-VOL management area, or the number of pair tables. Calculate the number of XP Snapshot pairs that can be created, first by using the number of differential tables, then by using the capacity of shared memory for the V-VOL management area, and finally by using the number of pair tables.
26,176 ÷ 4 = 6,544 Thus, the maximum number of XP Snapshot pairs that can be created is 6,544.
NOTE: You can check the capacity of the shared memory of the pool association information and the pool management block in the XP Snapshot window. See “XP Snapshot Window” (page 53). For the capacity of the shared memory for the whole V-VOL management area, see “Additional Shared Memory for the V-VOL Management Area” (page 37).
[ {(10 × 1,024 × 1,024) ÷ 524,288} = 31,668,568,064 ÷ 10,485,760 = 3,020 × 524,288] According to the result, the maximum number of XP Snapshot pairs that can be created is 3,020. If shared memory is added to your storage system and you know the pool capacity, you can roughly estimate the capacity of a P-VOL that can be created, see Table 18 (page 39). To calculate the actual capacity of a P-VOL that can be created, use the above formulas.
Performance Considerations If XP Snapshot performs a restore operation when the load of the subsystem is heavy, it is more likely that host server I/O performance (response) may be degraded. The Copy Threshold option allows you to effectively decrease the load of the subsystem. Notes on Defining Pool Capacity The pool capacity is the total capacity of the pool volumes that are defined in the pool. If the pool capacity is not enough, the status of the XP Snapshot pairs could change to PSUE.
Notes on Using External Volumes as Pool-VOLs By using XP External Storage, you can connect multiple storage systems to the XP24000/20000 Disk Array single storage system. In that case, the original storage system is called the local storage system, and the connected storage systems are called external storage systems. A volume in an external storage system is called an external volume. A volume in the local storage system is called an internal volume.
storing of snapshot data will not resume, and the status of some pairs may remain unchanged when the power supply is switched again. • If information in the shared memory is lost after switching off the power supply The storage system has a battery to maintain the information in the shared memory. However, when a certain time elapses after the breaker is turned off, the battery will die and the information in the shared memory will be lost.
To start XP Business Copy or LUN Expansion (LUSE)/Virtual LVI/LUN (VLL) and display the window: 1. Display the Remote Web Console main window. For information about how to display the Remote Web Console main window, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide. 2. Click Go and then XP Business Copy or Volume Manager on the menu bar of the Remote Web Console main window. Names of the windows that you need for XP Snapshot operation appear in the submenu. 3.
4 Using the XP Snapshot GUI XP Snapshot information and operations are presented on Remote Web Console windows that are also used for XP Business Copy and LUN Expansion (LUSE)/Virtual LVI/LUN (VLL). XP Snapshot uses the XP Business Copy Pair Operation, XP Business Copy History, XP Business Copy XP Snapshot, LUSE/VLL Pool, and LUSE/VLL V-VOL windows. This chapter describes the Remote Web Console windows that present XP Snapshot information and allow you to perform XP Snapshot operations.
Figure 6 Pair Operation Window Table 19 Pair Operation Window Items Item Description Display Filter button Displays the Display Filter dialog box (“Display Filter Dialog Box (XP Snapshot Tab Selected)” (page 68)) where you can filter the volumes displayed in the volume list. Tree (the area in the left portion of the window) Displays the ports that are defined paths or host groups, in tree style.
Table 19 Pair Operation Window Items (continued) Item Description Apply button Applies the operations displayed in the Preview list to the storage system. If the specified operations are applied successfully, the Preview list will be cleared. If an error occurs during an operation, the failed operation will remain in the Preview list with an error icon ( ) displayed in front. Details about the error (error code and message) are displayed on the error dialog box.
Table 20 Volume List Items (continued) Item Description Message Displays when there is no volume or pair to be displayed. If you see the message in the Volume List, click a different icon in the tree on the left area of the Pair Operation window. P-VOL Displays information about P-VOL in AAA-BB-CCC(XX:YY:ZZ) format.
Table 20 Volume List Items (continued) Item Description CTG Displays the consistency group number of the XP Snapshot pair. When the consistency group is not specified, dotted lines (- - -) are displayed. For information about what will be displayed for an XP Business Copy pair, see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide. SvolMode Displays the status of the S-VOL. When the data is not written in the S-VOL, (- - -) appears. When the data is written in the S-VOL, W appears.
Table 22 Menus of the Volume List of XP Business Copy's Pair Operation Window (In Case an XP Snapshot Pair Is Selected) Command Function Detail Opens the Detail dialog box (“Detail Dialog Box for an XP Snapshot Pair” (page 92)). Pairsplit-S Opens the Pairsplit-S dialog box (“Pairsplit-S Dialog Box” (page 90)). S-VOL Path Opens the S-VOL Path dialog box (“S-VOL Path Dialog Box” (page 93)).
Figure 8 Preview List Table 23 Preview List Items Item Description P-VOL Displays information about the P-VOL in AAA-BB-CCC(XX:YY:ZZ) format. • AAA: The port ID (cluster and channel number) • BB: The group number of the host group • CCC: LU number • XX:YY:ZZ: LDKC number:CU number:LDEV number An LDEV number that ends with a # indicates that the LDEV is an external volume (for example, 00:00:01#).
Table 23 Preview List Items (continued) Item Description CLPR(P) Displays the cache logical partition of the P-VOL. CLPR(S) Displays the cache logical partition of the S-VOL. Error Code Displays the code that indicates the cause of the error. If there is no error, dotted lines (- - -) will display. Menu When you select and right-click items in the Preview list, the menu displays the following commands: • Delete: Cancels the selected operation(s) in the Preview list.
Table 24 History Window Items Item Description Previous button Allows you to return to the previous page of the list. This button is selectable only when the number of operation histories in the storage system exceeds 16,384, which is the maximum number of histories that can be displayed on one page. The button is grayed-out if the total number of operation histories in the storage system is less than 16,384. Next button Allows you to turn to the next page of the list.
Table 25 XP Snapshot History Reference Codes and Messages (continued) Code Message Description 0x2032 COPY(RS-R) ENDED ABNORMAL Restoration of an XP Snapshot pair ended abnormally. 0x2051 COPY(RS) Snapshot data was deleted. 0x2070 PSUE(ABNORMAL END) A failure occurred and the status of the XP Snapshot pair changes to PSUE. 0x2040 INITIALIZE START Initialization started. 0x2041 INITIALIZE END Initialization ended normally. 0x2042 INITIALIZE ENDED ABNORMAL Initialization ended abnormally.
Table 26 The XP Snapshot Window Display Item Description Tree (the area in the left portion of the window) Pools in the disk storage system are displayed in the tree style. The following icons are displayed in the tree.
Table 26 The XP Snapshot Window Display (continued) Item Description Pool Association Inf.: X GB / Y GB X indicates the capacity of the pool association information in use. Y indicates the maximum possible capacity of the pool association information, including the capacity of the pool association information in use.
Table 26 The XP Snapshot Window Display (continued) Item Description Menu (Preview list in the XP Snapshot window) If you select and right-click the operations in the Preview list, the menu appears. Delete: Cancels the selected operation and deletes the operation from the Preview list in the XP Snapshot window. Error Detail: Displays the error message box, which displays the error code and message. For the XP Snapshot error codes, see the HP StorageWorks XP24000/XP20000 Remote Web Console Error Codes.
Table 27 Pool Window Description Item Description Pool Mng. Capacity The name of the program product that uses pool management capacity is displayed. • used Indicates the capacity (GB) of the pool management blocks in use. • total Indicates the maximum possible capacity (GB) of the pool management blocks, including the capacity of the pool management blocks in use.
Table 27 Pool Window Description (continued) Item Pool-VOL list 58 Using the XP Snapshot GUI Description
Table 27 Pool Window Description (continued) Item Description Information about the pool-VOLs that are registered in the pool selected in the Pool tree. The following items are displayed in the list. • LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the pool-VOL An LDEV number that ends with a # indicates that the LDEV is an external volume (for example, 00:00:01#).
Table 27 Pool Window Description (continued) Item Description you can add to the pool 60 Add Pool-VOL button Adds the selected volume(s) in the Free LDEVs list as pool VOL(s) to the pool that you selected from the Pool tree. LDKC drop-down list If you select a CU number from the drop-down list, the volumes in the CU will be displayed in the Free LDEVs list. Note that if you select an LDKC from the LDKC drop-down list, only the CUs in the selected LDKC are displayed.
Table 27 Pool Window Description (continued) Item Description Free LDEVs list Among the volumes in the CU which is selected from the CU drop-down list, the volumes that can be specified as pool-VOLs will be displayed. The following items are displayed in the list. • LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the volume An LDEV number that ends with a # indicates that the LDEV is an external volume (for example, 00:00:01#).
Table 27 Pool Window Description (continued) Item Description Pool Information box Information about the pool that you selected in the Pool tree will be displayed. The following items are displayed in the box.
Table 28 Menus of the Pool Tree Menu Function When you New Pool right-click the XP Snapshot icon: Opens the New Pool dialog box (“New Pool Dialog Box” (page 71)). You can select this menu command only when you right-click the XP Snapshot icon. Delete Pool(s) Deletes multiple pools at the same time. You can select this menu command only when the pools that can be deleted exist. Restore Pool(s) Recovers multiple blocked pools to the normal status at the same time.
V-VOL group, use the Virtual LVI/LUN function. To use the Virtual LVI/LUN function, you need a license for this function. For details about the Virtual LVI/LUN function, see the HP StorageWorks XP24000/XP20000 Virtual LVI/LUN (VLL) and Volume Shredder User Guide. The V-VOL window displays the following items. Table 29 V-VOL Window Items Item Description V-VOL Group – V-VOL tree (the area in the left portion of the window) The V-VOL groups in the disk storage system are displayed in the tree style.
Table 29 V-VOL Window Items (continued) Item Description Apply button Applies the operations that have been performed in the V-VOL window to the storage system. If the specified operations are completed successfully, the contents that have been displayed in blue italic fonts in the V-VOL group tree or V-VOL list will be displayed in normal black fonts. If an error occurs during the operations, the error code and error message will be displayed in the error message box.
5 Performing XP Snapshot Operations This chapter provides instructions for performing XP Snapshot operations.
Figure 13 Using XP Snapshot To create the pools and V-VOLs, you need to use Remote Web Console. To create XP Snapshot pairs and perform subsequent operations, you need to use the RAID Manager. When deleting pairs, you can also use Remote Web Console. • Before creating a pool, it is required that the virtual volume management area is created in the shared memory. The virtual volume management area is automatically created when the additional shared memory is installed.
Figure 14 Display Filter Dialog Box (XP Snapshot Tab Selected) • For details about the XP Business Copy tab of the Display Filter dialog box, see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide. • The filter settings are only effective within the current operations in the XP Business Copy's Pair Operation window. If you start another program product or click a button on the toolbar on the Remote Web Console main window, the settings will be reset.
• Pair Status box The following check boxes are displayed. ◦ XP Business Copy: Displays or hides the XP Business Copy pairs. ◦ XP Snapshot: Displays or hides the XP Snapshot pairs. If the check box is not selected, all the check boxes in each tab will be unavailable. • XP Business Copy tab This tab is for XP Business Copy pairs. For details, see the HP StorageWorks XP24000/XP20000 Business Copy Software User Guide.
1. Change the mode of the Remote Web Console to Modify. If the mode is already changed to Modify, you can skip this step. For information on how to change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide. 2. 3. Right-click XP Snapshot in the Pool tree of the Pool window (“Pool Window” (page 56)). A menu is displayed. Select New Pool from the menu. The New Pool dialog box (“New Pool Dialog Box” (page 71)) is displayed. Enter the pool ID in the Pool ID text box.
10. To create another pool, repeat Step 1 and the subsequent steps. Click Apply. A confirmation message is displayed asking if it is OK to apply the setting to the storage system. CAUTION: You cannot delete the pool-VOLs after you add them. So, make sure that the settings of the pool-VOLs you are going to add are right. 11. Click OK. The confirmation message closes and the new pool information is applied to the storage system.
To change the threshold of the pool: 1. Change the mode of the Remote Web Console to Modify. If the mode is already changed to Modify, you can skip this step. For information on how to change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide. 2. 3. 4. Select and right-click the pool whose setting you want to change in the Pool tree of the Pool window. A menu appears. If the pool usage rate is 95% or higher, the menu will not be displayed.
2. 3. 4. 5. 6. Select and right-click the pool you want to delete in the Pool tree of the Pool window. A menu is displayed. If the amount of the pool capacity that is used is other than zero (0) GB, the menu will not be displayed. Select the Delete Pool command from the menu. A confirmation message is displayed asking if it is OK to delete the selected pool. Click OK. The icon of the selected pool changes to the icon which indicates the deleting process. Click Apply.
2. Click Optimize in the Pool window. A confirmation message is displayed asking if it is OK to optimize the V-VOL management area or the pool management block. 3. Click OK. A confirmation message is displayed asking if it is OK to cancel all the operations performed in the Pool window. 4. Click OK. The confirmation message indicating if it is OK to apply the setting to the storage system and perform the initialization is displayed. 5. Click OK.
groups are created for XP External Storage, you can enter only a whole number under 63221. • If you create multiple V-VOL groups at the same time, all V-VOLs that are going to be registered in each V-VOL group will have the same emulation type and capacity. 8. Click Next. The Create V-VOL wizard dialog box (1) (“Create V-VOL Wizard Dialog Box (1)” (page 77)) is displayed. 9. Select the emulation type of the V-VOL from the Emulation Type drop-down list. 10.
21. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage system is displayed. 22. Click OK. The confirmation message closes and the new V-VOL information is applied to the subsystem. Figure 17 New V-VOL Group Dialog Box The New V-VOL Group dialog box displays the following items. • V-VOL Group drop-down list You can select or enter the V-VOL group ID in the drop-down list. A whole number from 1 to 65536 can be selected or entered in the drop-down list.
Figure 18 Create V-VOL Wizard Dialog Box (1) The Create V-VOL wizard dialog box (1) displays the following items. • V-VOL Group V-VOL group ID that you set in the New V-VOL Group dialog box is displayed. • Emulation Type drop-down list You can select the emulation type of the V-VOL. • Capacity Unit drop-down list You can select the unit of the capacity of the V-VOL: MB (megabyte), block, or Cyl. • Capacity text box You can enter the capacity of the V-VOL in the text box.
V-VOLs per V-VOL group. In this case, (1 - 10) is displayed on the right of the Number of V-VOL text box. • Set button Adds the V-VOL(s) to the V-VOL information setting list. • Delete button Deletes the selected V-VOL(s) from the V-VOL information setting list. • V-VOL information setting list (for example, middle of the dialog box) Information about the V-VOL(s) that you are going to create is displayed. • ◦ No.
Figure 19 Create V-VOL Wizard Dialog Box (2) The Create V-VOL wizard dialog box (2) displays the following items. • V-VOL information setting list (upper right area of the dialog box) Information about the V-VOL(s) that you are going to create is displayed. • ◦ No.: number ◦ V-VOL Group: V-VOL group ID ◦ Emulation: emulation type of the V-VOL ◦ Capacity: capacity of the V-VOL ◦ LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the V-VOL Select LDKC No.
list are displayed. Numbers in the upper end and the left side indicate the LDEV number. For example, the LDEV number of the cell whose upper end is +2 and left side is +10 is 12. Gray cells indicate the LDEV numbers that are already used for other volumes, white cells indicate the unused LDEV numbers, and blue cells indicate the LDEV numbers that are selected for the V-VOLs in this dialog box.
: LDKC number or CU number. Indicates that SSID is assigned to the all boundary ◦ areas. • ◦ : LDKC number or CU number. Indicates the boundary area with no SSID. ◦ : Indicates that no SSID is assigned to the boundary area. Set SSID list Assigns SSID to the boundary area that contains LDEV numbers you set in this dialog box. Information about the Set SSID list: • ◦ LDKC: LDKC number of CU number where SSID is not assigned. ◦ CU: CU number where SSID is not assigned.
Figure 21 Create V-VOL Wizard Dialog Box (4) The Create V-VOL wizard dialog box (4) displays the following items. • V-VOL Group drop-down list You can select the V-VOL group number of the V-VOL you set. Note that you cannot enter the number. • V-VOL information setting list (middle of the dialog box) Information about the V-VOL(s) whose V-VOL number you selected from the V-VOL Group drop-down list is displayed.
Deleting Virtual Volumes and a Virtual Volume Group To delete V-VOL(s) and a V-VOL group: 1. 2. 3. 4. 5. 6. Change the mode of the Remote Web Console to Modify. If the mode is already changed to Modify, you can skip this step. For information on how to change the mode, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide. In the V-VOL group tree in the V-VOL window, select and right-click the V-VOL group which contains the V-VOL(s) you want to delete. A menu is displayed.
6. 7. Click OK. The Delete V-VOL Groups dialog box closes. A confirmation message indicating if it is OK to apply the setting to the storage system is displayed. Click OK. The confirmation message closes and the deletion of the V-VOL groups is applied to the subsystem. If you click the Cancel button in this message, the Delete V-VOL Groups dialog box is displayed again. If the specified V-VOL groups are not deleted, a dialog box is displayed.
• Icons The following icons are displayed in the dialog box. • ◦ V-VOL group ◦ V-VOL group (in the process of being deleted) The Page area displays the number of the current page and the following items are used to change pages of the list. ◦ Previous button allows you to display the previous 4,096 V-VOL groups. ◦ N/M drop-down list: The N displays the number of the current page. The M displays total number of pages.
You can store one snapshot data at a time by using the pairsplit command, but you cannot specify the snapshot data ID. For details about the pairsplit command, see the HP StorageWorks XP RAID Manager User Guide. XP Snapshot does not support Quick Split mode. If you specify Quick Split mode, snapshot data will not be stored in the pool, even if the command ends normally. Therefore, even if you specify Quick Split mode, Quick Split mode does not take effect.
Consistency group: • You cannot specify the XP Snapshot pairs in the same consistency group if the pairs share the same volume as P-VOL. If you specify these pairs in the same consistency group, the paircreate command will be rejected. • You should not mix pairs created with the At-Time Snapshot option and without the At-Time Snapshot option in the same group as the group which is defined in the RAID Manager configuration file. This group differs from the consistency group.
case, find the consistency group number by sorting the CTG column on the XP Snapshot window or Pair Operation window of XP Business Copy, and create a pair specifying the consistency group number intentionally.
XP Snapshot does not support Quick Resync mode. If you specify Quick Resync mode, snapshot data will not be deleted even if the command ends normally. Therefore, even if you specify Quick Resync mode, Quick Resync mode does not take effect. Deleting XP Snapshot Pairs Use the command of the RAID Manager or the Pairsplit-S dialog box to delete XP Snapshot pairs. If you use the RAID Manager to delete XP Snapshot pairs, you need to use the pairsplit -S command.
Figure 23 Pairsplit-S Dialog Box When you select an XP Snapshot pair and display the Pairsplit-S dialog box, the dialog box displays the following items. • Volume list Information about the XP Snapshot pairs you are going to delete is displayed. ◦ P-VOL: Information about the P-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
• ◦ Capacity(MB): storage capacity of the XP Snapshot pair ◦ CLPR(P): cache logical partition of the P-VOL ◦ CLPR(S): cache logical partition of the S-VOL OK button Closes the Pairsplit-S dialog box and displays the list of XP Snapshot pairs in the Preview list. • Cancel button Cancels the operation and closes the Pairsplit-S dialog box.
Figure 24 Detail Dialog Box for an XP Snapshot Pair The Detail dialog box displays the following items. • P-VOL LDKC number, CU number, and LDEV number of the P-VOL are displayed. • Emulation Emulation type of the P-VOL is displayed. • Capacity(MB) Capacity of the P-VOL is displayed. The unit is megabytes (MB). • Capacity(blocks) The number of blocks used by the P-VOL is displayed. • CLPR(P) The cache logical partition (CLPR) of the P-VOL is displayed.
◦ CLPR(S): cache logical partition (CLPR) of the S-VOL ◦ CTG: consistency group number of the XP Snapshot pair. When the consistency group is not specified, dotted lines (- - -) will appear. • Refresh the window after this dialog box is closed check box If you select the check box, the information displayed in XP Business Copy's Pair Operation window will be updated after the Detail dialog box closes.
information for the P-VOLs and S-VOL displays the path information for the S-VOLs in AAA-BB-CCC(XX:YY:ZZ) format. ◦ AAA: The port ID (cluster name and channel number) ◦ BB: The group number (G-ID) of the host group ◦ CCC: LU number ◦ XX: YY: ZZ: LDKC number: CU number: LDEV number An LDEV number that ends with a # indicates that the LDEV is an external volume (for example, 00:00:01#).
Figure 26 Information Dialog Box The following information will be displayed in the Information dialog box: • XP Business Copy pair(s) The number of XP Business Copy pairs will be displayed in the format XXXX / YYYY. XXXX indicates the number of XP Business Copy pairs, and YYYY indicates the total number of XP Business Copy pairs and XP Business Copy for Mainframe pairs. • XP Snapshot pair(s) The number of XP Snapshot pairs will be displayed.
for XP Business Copy. Unlimited will be displayed when there is no limit on the license capacity for XP Business Copy. • XP Snapshot Used volume (TB) License information for XP Snapshot will be indicated in the format of X(Y). X indicates license capacity used by XP Snapshot, and Y indicates total license capacity reserved for XP Snapshot. Unlimited will be displayed when there is no limit on the license capacity for XP Snapshot. • Close button Closes the Information dialog box.
6. If there are more than 16,384 records of operations, click Next. The list displays subsequent records of operations. • If you click Previous, the list switches to the previous page. • If there are 16,384 or fewer records of operations, you cannot click Previous and Next. • The storage system saves up to 524,288 records of the latest operations.
6 Troubleshooting This chapter provides troubleshooting information for XP Snapshot. • “Procedure to Recover a Blocked Pool” (page 101) • “Procedure to Complete the Pool-Related SIMs” (page 102) • “Troubleshooting When Using XP RAID Manager” (page 103) If you have a problem with the Remote Web Console, see the HP StorageWorks XP24000/XP20000 Remote Web Console User Guide for troubleshooting information. Table 32 (page 99) shows problems that might occur when you are using XP Snapshot.
Table 32 Troubleshooting for XP Snapshot Problem Causes and Solutions Cannot install XP Snapshot. Causes: • Shared memory for the V-VOL management area is not installed. • Shared memory is not set for the V-VOL management area. • Shared memory for the differential tables is not installed. Solutions: • Call HP technical support and check if the shared memory for the V-VOL management area and the differential tables is installed.
Table 32 Troubleshooting for XP Snapshot (continued) Problem Causes and Solutions Cannot create XP Snapshot pairs. Causes: • There are not enough differential tables to create the pairs. • The conditions to create the pair are not fulfilled. • The volumes specified to create the pair are in SMPL(PD) status because the pair is being deleted. Solutions: • Secure enough differential tables to create the XP Snapshot pairs. • Fulfill the conditions to create the pair and try the pair creation again.
Table 32 Troubleshooting for XP Snapshot (continued) Problem Causes and Solutions When the host computer Causes: tries to access the port, an • Some ports go offline because the access to the volume on the other port(s) error occurs and the host is rejected. cannot access the port. Solutions: • Wait for a while, then try the operation again. • If the application software is installed in the host to monitor the volume, terminate the application.
4. 5. 6. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage system is displayed. Click OK. The confirmation message closes and the restoration of the pools is applied to the storage system. You can check whether the pool is recovered from the blocked status in the Pool window. If Status of the Pool Information displays Normal, or if the icon in the Pool tree indicates the normal status, the blocked pool is restored successfully.
Troubleshooting When Using XP RAID Manager When an error has occurred during an XP Snapshot Pair operation using RAID Manager, see the log displayed on the RAID Manager window or the RAID Manager operation log file to see if you can identify the cause of the error. The RAID Manager operation log file is stored in the following directory by default. The log file is stored in: /HORCM/log*/curlog/horcmlog_HOST/horcm.log Where: • * is the instance number. • HOST is the host name.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) SSB1 SSB2 RAID Manager Command Cause of Error B901 9685 paircreate Because of the shortage of the pair tables, XP Snapshot pair cannot be created. 9686 paircreate Because of the shortage of the differential tables, XP Snapshot pair cannot be created. 9700 paircreate Since the pool is not available, XP Snapshot pair cannot be created.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error The command ended abnormally because the pair is in the status that the corresponding command is not accepted at present. This error also may be reported when the command is executed with specifying an unsupported parameter. 971a paircreate Since the capacity of shared memory is insufficient, the pair cannot be created.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error paircreate, pairsplit, pairresync, pairresync pairresync 9728 paircreate, pairsplit, pairresync, pairresync - Since you specified the volume that is in process of formatting as the XP Snapshot P-VOL, the command ends abnormally.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error When XP Snapshot P-VOL and XP Continuous Access Journal Software P-VOL share the volume, the status of the XP Continuous Access Journal pair is other than PSUS or PSUE. Therefore, the XP Snapshot pair cannot be restored.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error paircreate pairsplit, pairresync, pairresync restore 973f paircreate pairsplit, pairresync, pairresync restore 108 Troubleshooting Since you specified the volume whose emulation type is other than OPEN-V as the XP Snapshot S-VOL, the command ends abnormally.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error Since you specified XP Continuous Access Journal S-VOL as the XP Snapshot S-VOL, the pair cannot be created. 974c paircreate Since you specified XP Continuous Access Journal journal volume as the XP Snapshot S-VOL, the pair cannot be created. 974f All commands Since the volume you specified as the S-VOL has an S-VOL Disable attribute, the command ends abnormally.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error Since you specified the XP Auto LUN target volume as the XP Snapshot P-VOL, the command ends abnormally. For information about using XP Auto LUN, contact HP technical support (see “Contacting HP” (page 116)). 9759 All commands Since you specified the XP Auto LUN reserved volume as the XP Snapshot P-VOL, the command ends abnormally.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error The XP Snapshot pair cannot be created for any of the following reasons: • The shared memory is not increased. • Initialization is in process. 976a paircreate Unavailable parameter (unsupported parameter) is specified in the command. 976c pairsplit Since the command was executed with the PSUE option, the snapshot data cannot be stored.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error When the XP Snapshot P-VOL and XP Business Copy P-VOL share the volume, the XP Business Copy P-VOL you specified for the XP Snapshot P-VOL has consistency group settings. Therefore, the XP Snapshot pair cannot be created. 9777 paircreate When the XP Snapshot P-VOL and XP Business Copy S-VOL share the volume, you specified MU number zero (0) for the XP Snapshot P-VOL.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error Since the pool or the pool-VOL is blocked, the snapshot data cannot be stored. 9783 pairresync, restore The XP Snapshot pair cannot be restored for any of the following reasons: • The snapshot data of the XP Snapshot pair for restoration is being stored per consistency group.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error The XP Snapshot pair cannot be created because the specified consistency group number is out of the range of the number that can be specified. 978c pairsplit The snapshot data cannot be stored because the XP Continuous Access asynchronous pair status is other than PSUS or PSUE when XP Snapshot (P-VOL) and XP Continuous Access asynchronous (S-VOL) share the volume.
Table 33 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error paircreate The XP Snapshot pair operation failed because the specified S-VOL is wrong. pairsplit pairresync B9A7 All commands The consistency group information cannot be obtained because the XP Snapshot is not installed.
7 Support and other resources Contacting HP HP technical support For worldwide technical support information, see the HP support website: http://www.hp.
• HP StorageWorks XP24000/XP20000 Performance Control User Guide • HP StorageWorks XP RAID Manager User Guide You can find these documents on the HP Manuals website: http://www.hp.com/support/manuals In the Storage section, click Storage Software and then select a product. Websites For additional information, see the following HP websites: • http://www.hp.com • http://www.hp.com/go/storage • http://www.hp.com/support/manuals • http://www.hp.
Table 34 Document conventions (continued) Convention Element Monospace text • File and directory names • System output • Code • Commands, their arguments, and argument values Monospace, italic text • Code variables • Command variables Monospace, bold text Emphasized monospace text . . Indication that the example continues. . WARNING! An alert that calls attention to important information that if not understood or followed can result in personal injury.
Glossary 3 3DC Three data center. C CCI Command control interface. An HP RAID manager. CLPR Cache logical partition. CLPR(P) Cache logical partition of the P-VOL. CLPR(S) Cache logical partition of the S-VOL. CTG Consistency group. CU Control unit. CV Custom sized volume. CYL Cylinder. D DKC Disk controller. DKCMAIN Disk controller main. F FC Fibre Channel. A network technology primarily used for storage networks. G G-ID Host group ID. L LD, LDEV Logical device.
P P-VOL Primary volume. PDEV Physical device. PFUL PAIR closing full status. PFUS PSUS closing full status. PSUE Pair suspended-error. PSUS Pair suspended-split. R RMI Remote method invocation. S S-VOL Secondary or remote volume. The copy volume that receives the data from the primary volume. SATA Serial Advanced Technology Attachment. SIM Service information message. SLPR Storage logical partition. SMPL Simplex. SSB Sense byte. SSD Solid state disk. SVP Service processor.
Index A access attribute, 27 Auto LUN, 27 C calculating the maximum number of pairs, 36 Change Pool Information dialog box, 72 command device, 35 components, 8 conventions storage capacity values, 117 COPY, 15 Copy Threshold option, 25 COPY(RS), 15 Create V-VOL wizard dialog box (1), 77 Create V-VOL wizard dialog box (2), 79 Create V-VOL wizard dialog box (4), 82 New V-VOL Group dialog box, 76 number of differential tables calculating the number of XP Snapshot pairs, 36 O optional requirements, 35 P Pai
volume list, 46 volume requirements, 33 W websites HP, 117 HP Subscriber's Choice for Business, 116 product manuals, 117 X XP XP XP XP XP XP Business Copy, 27 Continuous Access, 30 Continuous Access Journal, 30 Snapshot Software license requirements, 35 Snapshot window, 53 Thin Provisioning, 32 122 Index