HP StorageWorks Snapshot XP user guide Part number: T1713–96023 Fifth edition: October 2006
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Contents About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . Supported storage platforms and firmware Intended audience . . . . . . . . . . Prerequisites . . . . . . . . . . . . Related documentation . . . . . . . . Document conventions and symbols . . HP technical support . . . . . . . . . Subscription service . . . . . . . . . HP web sites . . . . . . . . . . . . Documentation feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combining Snapshot XP with other software products . . . . . . . . . . . . Combining Snapshot XP with Business Copy XP . . . . . . . . . . . . Combining Snapshot XP with Continuous Access XP or Continuous Access XP Combining Snapshot XP with Auto LUN XP . . . . . . . . . . . . . . Combining Snapshot XP with LUN Security XP Extension . . . . . . . . . 5 Snapshot XP operations . . . . . . . . Journal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ..Snapshot XP mechanism . . . . . . . . . . ..Snapshot XP pair and pool mechanism . . . ..Procedure for using Snapshot XP . . . . . . ..Snapshot XP pair status transition . . . . . . ..Business Copy XP main pane . . . . . . . . ..Volume list . . . . . . . . . . . . . . . . ..Preset List . . . . . . . . . . . . . . . . ..Display Filter pane (Snapshot XP tab selected) ..Pool pane . . . . . . . . . . . . . . . . ..New Pool pane . . . . . . . . . .
Tables 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 6 ..Document conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..Requirements for Snapshot XP P-VOLs . . . . . . . . . . . . . . . . . . . . . . . ..Requirements for Snapshot XP S-VOLs . . . . . . . . . . . . . . . . . . . . . . . ..Requirements for Snapshot XP pool-VOLs . . . . . . . . . . . . . . . . . . . . . . ..Requirements for using Snapshot XP . . . . . . . . . . . . . . . . . . . . . . . . ..
About this guide This guide provides information about: • • • • • Understanding Snapshot XP and Business Copy XP Understanding Snapshot XP functions Preparing to use Snapshot XP Using Snapshot XP Troubleshooting Snapshot XP Supported storage platforms and firmware In this guide, the term array refers to the following storage platforms: • HP StorageWorks XP12000 Disk Array • HP StorageWorks XP10000 Disk Array • HP StorageWorks 200 Storage Virtualization System For information about required firmware versio
You can find the above documents at http://www.hp.com/support/rwc/manuals/ • HP StorageWorks RAID Manager XP user guide You can find the above document at http://www.hp.com/support/manuals/ Document conventions and symbols Table 1 Document conventions Convention Element Blue text: Table 1 Cross-reference links and e-mail addresses Blue, underlined text: (http://www.hp.
• • • • Product model names and numbers Error messages Operating system type and revision level Detailed, specific questions For continuous quality improvement, calls may be recorded or monitored. Subscription service HP recommends that you register your product at the Subscriber's Choice for Business web site: http://www.hp.com/go/e-updates/ After registering, you will receive e-mail notification of product enhancements, new driver versions, firmware updates, and other product resources.
About this guide
1 Overview of copy solutions HP StorageWorks XP12000/XP10000/SVS200 arrays provide an extensive suite of data replication software. This chapter describes HP StorageWorks Snapshot XP. This chapter also covers portions of HP StorageWorks Business Copy XP because Snapshot XP is an integrated feature of Business Copy XP. NOTE: The use of Snapshot XP, Business Copy XP, and all other software products is governed by the terms of your license agreements with Hewlett-Packard.
Figure 1 Snapshot XP mechanism In Figure 1, Data A is stored in the Snapshot XP pair's P-VOL. When the host requests to update Data A to Data B, Snapshot XP copies Data A to the pool volume (pool-VOL) in the pool before updating the P-VOL. After the copy operation for Data A is complete, Snapshot XP writes Data B to the area where Data A was stored in the P-VOL, and the P-VOL is updated. From the S-VOL, you can access Data B in the P-VOL and Data A in the pool-VOL.
Business Copy XP Use Business Copy XP to maintain array-internal copies of all user data on the array for data on open systems such as UNIX and PC servers. Business Copy XP creates a pair of P-VOL and S-VOL, both of which are logical volumes in the same array or in externally attached storage. Pairs that Business Copy XP creates are called Business Copy XP pairs. RAID-protected S-VOLs are created within the same array as the P-VOL. Use Business Copy XP to create up to three S-VOLs for a P-VOL.
Overview of copy solutions
2 Snapshot XP functions Snapshot XP creates pairs consisting of a P-VOL and S-VOL. When creating a pair, Snapshot XP uses a V-VOL as the pair's S-VOL. In addition, you can manage the P-VOL's snapshot data by copying the data to an area called the pool. This chapter describes the volumes Snapshot XP uses first, and then describes Snapshot XP functions. Volumes Snapshot XP uses Snapshot XP uses the P-VOL, S-VOL, and pool-VOL.
Snapshot XP secondary volumes Table 3 Requirements for Snapshot XP S-VOLs Item Requirement Volume type V-VOL You cannot specify the following volumes as Snapshot XP S-VOLs: • Volumes used as a Snapshot XP pair's S-VOL • Volumes used by another software product's pair or migration plan NOTE: A LUSE S-VOL must be paired with a P-VOL that has the same size and structure.
pool management block and pool association information in the V-VOL management area is fixed. If the pool management block's capacity is insufficient, problems might occur. For example, you cannot create pools or pools with a large capacity. To solve such problems, initialize the V-VOL management area. For more information, see Initializing V-VOL management areas or pool management blocks. Creating pools A pool is an area where the snapshot data that Snapshot XP obtains is stored.
CAUTION: If you are using HP-UX® as a host server, observe the following when executing the command on V-VOLs to recognize the device from the host server: • If the host server already recognizes the device, do not change its volumes to V-VOLs. • Before executing the command to recognize the device, create Snapshot XP pairs and store snapshot data. If you do not follow these cautions, an error might occur and the host server might be terminated.
NOTE: When deleting a Snapshot XP pair, the volumes' status becomes SMPL(PD). You cannot create pairs using SMPL(PD) volumes. If the volumes are in SMPL(PD) status, wait for a while and issue the command to create pairs after the volumes' status changes to SMPL. Use the Business Copy XP main pane to see the volume's status. Using RAID Manager XP, you can check the volume status with the pairdisplay command, but you cannot distinguish between SMPL and SMPL(PD) volumes.
NOTE: Copy operations stopped by the Copy Threshold option resume when the array's load become light.
In addition, you can view operation history for Snapshot XP pairs, such as creating or deleting Snapshot XP pairs and storing snapshot data, on the History pane. For more information, see Displaying detailed information about Snapshot XP pairs.
Snapshot XP functions
3 Requirements for Snapshot XP operations This chapter describes requirements for using Snapshot XP, installing Snapshot XP, and calculating the number of pairs that Snapshot XP can create. Requirements for using Snapshot XP Table 5 Requirements for using Snapshot XP Item Requirement RAID level RAID1, RAID5, or RAID6 Shared memory Install shared memory for the differential table on the base board. Configure shared memory so you can create the V-VOL management area in the shared memory.
NOTE: • Contact your HP account support representative to install additional shared memory for the V-VOL management area. • After installing additional shared memory for the V-VOL management area, you cannot partially uninstall it. To uninstall additional shared memory for the V-VOL management area, you must uninstall the entire shared memory added for the V-VOL management area. • Skip step 1 if shared memory for the differential tables is already installed.
( (X) ÷ 256) ÷ (Z) where: (X) is the volume's capacity (in kilobytes) (Z) is the number of slots a differential table can manage (1,916 × 32) You must round up the calculation result to the nearest whole number. If the volume's capacity ((X) in the previous formula) is 16 GB (16,777,216 KB), the number of differential tables for each Snapshot XP pair is calculated as: (16,777,216 ÷ 256) ÷ (1,916 × 32) = 1.06889 Round up 1.06889 to 2.
S1 = S – S2 - 8 S — Shared memory capacity for the whole V-VOL management area (in bytes) S2 — Shared memory capacity for pool management block (in bytes) 8 — Fixed management information (in megabytes). NOTE: You can check the capacity of the shared memory of pool association information and pool management block in the Snapshot XP pane.
Example S2 = ↑[{ 4398046511104 ÷ (256 × 1024)} × (32 ÷ 74784)]↑ × 74784 = ↑7178.9542...↑ × 74784 = 536874336 S1 = 1073741824 – 536874336 – 8 × 10242² = 528478880 Total capacity of P-VOLs (kB) = ↑(528478880 ÷ 74784 )↑ × 16384 × 256 = ↑7066.737...
Requirements for Snapshot XP operations
4 Using Snapshot XP This chapter describes procedures for using Snapshot XP. The first section describes the flow of Snapshot XP processes. The next section describes how the status of a Snapshot XP pair changes while using Snapshot XP. The other sections provide information needed to create pools and switch off the array's power supply after you start using Snapshot XP.
NOTE: • Before creating a pool, you must create the virtual volume management area in shared memory. Virtual volume management areas are automatically created when you install additional shared memory. For more information about installing additional shared memory, contact your HP account support representative.
2. Issue the paircreate command on the SMPL volume to create a Snapshot XP pair. When creating the first pair for the P-VOL, the pair status changes to COPY. When the operation completes, the pair status changes to PAIR. If you specify a volume that is already paired with one or more S-VOLs as the P-VOL to create another pair, the pair status does not change to COPY. When the operation completes, the pair status changes to PAIR.
Table 6 Whether hosts can access P-VOLs and S-VOLs P-VOL Pair status S-VOL Read Write Read Write SMPL OK OK — — COPY OK OK No No PAIR/PFUL OK OK No No PSUS/PFUS OK OK OK OK SMPL(PD) OK OK No No COPY(RS) OK OK No No COPY(RS-R) OK OK No No PSUE OK1 OK1 No No 1If the pair status changes to PSUE because a failure occurred during the restoration, the host cannot access that pair.
When the command executes the process and ends normally, the pair status changes according to the process. For more information about how the pair status changes when the command ends normally, see Figure 4 and the corresponding text. Notes on creating pools When creating pools, you must be careful about the pool capacity and types of volumes specified as pool-VOLs. This section describes notes on pool capacity definitions and using external LUs as pool-VOLs.
Although you estimate copied data capacity and set pool capacity according to the information in this section, if pool capacity exceeds the threshold, implement the measures described in Troubleshooting Snapshot XP. Using external LUs as pool-VOLs By using External Storage XP, you can connect multiple arrays to the XP12000/XP10000/SVS200 array. In that case, the original XP12000/XP10000/SVS200 array is called the local array, and the connected storage arrays are called external arrays.
the microprogram offline, pool information or Snapshot XP pair information in shared memory is lost. Therefore, you must create pools and pairs again after replacing the microprogram. Combining Snapshot XP with other software products You can create Snapshot XP pairs by sharing volumes with other products, such as Business Copy XP or Continuous Access XP. In addition, you can create Snapshot XP pairs using volumes to which LUN Security XP Extension or RAID Manager XP have assigned attributes.
Table 9 Snapshot XP operations when Snapshot XP P-VOL and Business Copy XP P-VOL are shared Snapshot XP operations Business Copy XP pair status1 COPY PAIR COPY(SP) PSUS(SP) PSUS COPY(RS) COPY(RS-R) PSUE Creating pairs (paircreate) OK OK OK OK OK OK No OK Storing snapshot data (pairsplit) OK OK OK OK OK OK No OK Restoring pairs (pairresync -restore) No No No No OK No No OK Deleting snapshot data (pairresync) OK OK OK OK OK OK OK OK Deleting pairs (pairsplit -S) OK
Table 11 Business Copy XP operations when Snapshot XP P-VOL and Business Copy XP P-VOL are shared Business Copy XP operations Snapshot XP pair status1 COPY PAIR PSUS SMPL(PD) COPY(RS) COPY(RS-R) PSUE Creating pairs (paircreate) OK OK OK OK OK No OK Creating and splitting pairs (paircreate -split) OK OK OK OK OK No OK Splitting pairs (pairsplit) OK OK OK OK OK No OK Forward pair resynchronization (pairresync) OK OK OK OK OK No OK Normal backward pair resynchronization (
NOTE: Since a Snapshot XP S-VOL uses data in the P-VOL, Business Copy XP's quick backward pairresync operation (Quick Restore) is not allowed. For more information about Business Copy XP pair status and operations, see the HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200.
Table 15 Continuous Access XP/Continuous Access XP Journal operations when Snapshot XP P-VOL and Continuous Access XP/Continuous Access XP Journal P-VOL are shared Continuous Access XP/ Continuous Access XP Journal operations Snapshot XP pair status1 COPY PAIR PSUS SMPL(PD) COPY(RS) COPY(RS-R) PSUE Creating pairs (paircreate) OK OK OK OK OK No OK Splitting pairs (pairsplit) OK OK OK OK OK – OK Resynchronizing pairs (pairresync) OK OK OK OK OK No OK Deleting pairs (pairsplit -
Combining Snapshot XP with LUN Security XP Extension LUN Security XP Extension can set four kinds of access attributes on the volumes: Read/Write, Read Only, Protect, and S-VOL Disable. Snapshot XP cannot create a pair by specifying a volume whose access attribute is S-VOL Disable as the S-VOL. In addition, if the S-VOL Disable attribute is set on the Snapshot XP pair's P-VOL, you cannot restore the pair.
5 Snapshot XP operations This chapter describes Snapshot XP operations and panes. Displaying the Business Copy XP main pane 1. Launch Command View XP or XP Remote Web Console. 2. Click the Business Copy ( ) button. The Business Copy XP main pane appears. Figure 5 Business Copy XP main pane NOTE: Although the Business Copy XP main pane displays information about Business Copy XP and Snapshot XP pairs, this section only explains items related to Snapshot XP pairs.
Item Description Array Port Host group or iSCSI target LUN • Volume list (upper-right area of pane): Displays Business Copy XP or Snapshot XP pairs on the port, host group, iSCSI target, or LUN selected in the tree. You can sort volumes by any column heading in the volume list. • Preset list: Displays operations that have been performed in the Business Copy XP main pane, but have not been applied to the array. To apply operations displayed in the Preset list to the array, click Apply.
Figure 6 Volume list When you select a port, host group, iSCSI target, or LUN in the tree on the left side of the Business Copy XP main pane, information about volumes belonging to the selected item appears in the volume list. You can specify conditions such as pair status or reserved attribute on the Display Filter pane to select volumes that can be displayed in the volume list. For more information about the Display Filter pane, see Specifying conditions for volumes displayed in the volume list.
• Port: S-VOL's port ID (cluster and channel number). If there is no S-VOL, --- appears. • G-ID: Group number of the S-VOL's host group or iSCSI target. If there is no S-VOL, --- appears. • LUN(S): S-VOL's CU:LDEV (control unit image:logical device ID). If there is no S-VOL, --- appears. NOTE: An LDEV number ending with V (for example, 00:01 V) indicates the LDEV is a virtual volume. • CTG: Three hyphens (---) appear.
NOTE: • Grayed out commands are for Business Copy XP pairs. For more information about these commands, see the HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200. • When you select Paircreate or Pairsplit from the shortcut menu, the Paircreate or Pairsplit pane appears. However, you cannot use these panes to create or split Snapshot XP pairs. • Volumes X • X: Total number of volumes in the array. • Pairs W(X)/Y/Z • W: Total number of Business Copy XP pairs.
• Port: S-VOL's port ID (cluster and channel number). If there is no S-VOL, --- appears. • G-ID: Group number of the S-VOL's host group or iSCSI target. If there is no S-VOL, --- appears. • LUN(S): S-VOL's CU:LDEV (control unit image:logical device ID). If there is no S-VOL, --- appears. NOTE: An LDEV number ending with V (for example, 00:01 V) indicates the LDEV is a virtual volume. • Pace: Three hyphens (---) appear.
Figure 8 Display Filter pane (Snapshot XP tab selected) NOTE: • For more information about the Business Copy XP tab on the Display Filter pane, see the HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200. • Filter settings are only effective within the current operations in the Business Copy XP main pane. If you start another program, or click a button on the toolbar on the Command View XP or XP Remote Web Console main pane, the settings are reset.
NOTE: If the check box is not selected, all check boxes in both tabs are grayed out. • Business Copy tab: This tab is for Business Copy XP pairs. For more information, see the HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200. • Snapshot XP tab: Check boxes indicate the status of Snapshot pairs displayed. If you select or clear a check box, Snapshot XP pairs in that status are displayed or hidden in the volume list.
CAUTION: The value of Total Capacity in the Pool Information box and the value of Pool Mng. Block used capacity are approximately equal, but there might be some difference. Even if the value of Total Capacity in the Pool Information box is updated when pool-VOLs are added to or deleted from the pool, the value of Pool Mng. Block used capacity is not updated until you click Apply. NOTE: The capacity of the pool management block in use must be less than its total capacity.
• Capacity: Pool-VOL's capacity • Emulation: Pool-VOL's emulation type • PG: Parity group to which pool-VOL belongs • Total Capacity: Total capacity of pool-VOLs in the pool • Used LDEVs: Total number of pool-VOLs in the pool • Remaining LDEVs: Total number of pool-VOLs you can add to the pool • Add Pool-VOL button: Adds selected volumes in the Free LDEVs list as pool-VOLs to the pool selected in the Pool tree. • CU: Volumes in the selected CU are displayed in the Free LDEVs list.
• Cancel button: Cancels all operations performed in the Pool pane. Creating new pools The required time for creating pools depends on the number and capacity of pools and pool-VOLs you add to the pool. If you create many pools or if you add a large-capacity pool-VOL, it might take about 20 minutes at most until the entire processing ends. 1. Change Command View XP or XP Remote Web Console to Modify mode.
NOTE: The pool's storage capacity is the total capacity of pool-VOLs in the pool. For more information, see Notes on creating pools. 12. To create another pool, repeat step 2 through step 6. 13. Click Apply. A confirmation message appears. CAUTION: You cannot delete pool-VOLs after adding them. Check and ensure that the settings for the pool-VOLs you are adding are correct. 14. Click OK. The confirmation message closes, and the new pool information is applied to the array.
NOTE: If the pool usage rate is 95% or higher, the shortcut menu does not appear. 3. Select the threshold value from the Threshold list. NOTE: In the Threshold list, only values higher than the pool usage rate appear. 4. Click Set. The Change Pool Information pane closes. 5. Click Apply. A confirmation message appears. 6. Click OK. The confirmation message closes, and the setting change is applied to the array.
1. Change Command View XP or XP Remote Web Console to Modify mode. For instructions, see the HP StorageWorks Command View XP user guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000/SVS200. 2. On the Pool pane, select and right-click the Snapshot XP icon in the Pool tree, and select Delete Pool(s). A confirmation message appears. 3. Click OK. The pools' icons change indicating the pools being deleted. 4. Click Apply. A confirmation message appears. 5.
Figure 12 V-VOL pane NOTE: In the V-VOL pane, you can create or delete V-VOLs for a V-VOL group. To create or delete a V-VOL by itself, use Volume Manager. You need another license to use Volume Manager. For more information about Volume Manager, see the HP StorageWorks LUN Configuration and Security Manager XP user guide for the XP12000/XP10000/SVS200. • V-VOL group tree (left area of the pane): V-VOL groups in the array. The following icons appear in the tree.
• Emulation: V-VOL's emulation type NOTE: If the emulation type is followed by CVS, the volume is a custom volume (CV). For more information about CVs, see the HP StorageWorks LUN Configuration and Security Manager XP user guide for the XP12000/XP10000/SVS200. • Status: V-VOL's status • Normal • Blocked • CLPR: CLPR number of the CLPR to which the V-VOL belongs • Access Attribute: V-VOL's access attribute • Path: V-VOL's LU path • Apply button: Applies operations performed in the V-VOL pane to the array.
NOTE: You can enter only a whole number from 1 to 256 in the Number of V-VOL box. 11. Click Set. Volumes are added to the V-VOL information setting list (middle of the pane). To create more V-VOLs, repeat step 7 through step 11. NOTE: Using Snapshot XP, you cannot add new V-VOLs to the V-VOL group when creating V-VOLs. Ensure that you add enough V-VOLs to create the Snapshot XP pairs at this point. 12. Click Next. The Create V-VOL wizard pane (2) (Figure 15) appears. 13.
Figure 13 New V-VOL Group pane • V-VOL Group: V-VOL group ID. Select or enter a whole number from 1 to 8192. NOTE: Do not enter a V-VOL group ID that another V-VOL group is already using. If you enter a V-VOL group ID that another V-VOL group is already using and click Next, an error message appears. In that case, select or enter a different number for the new V-VOL group ID. • Emulation Type: V-VOL group's emulation type. • CLPR: V-VOL group's CLPR.
• • • • Number of V-VOL: Number of V-VOLs you want to add. Enter a whole number from 1 to 256. Set button: dds V-VOLs to the V-VOL information setting list. Delete button: Deletes selected V-VOLs from the V-VOL information setting list. V-VOL information setting list (middle of pane): Information about the V-VOL(s) you are creating. • No.: Number • Emulation: V-VOL's emulation type • Capacity: V-VOL's capacity • Back button: Returns to the New V-VOL Group pane while maintaining settings in this pane.
NOTE: • The value you specify as the interval between LDEV numbers counts only available LDEV numbers and skips those that are not selectable. • Even when you use multiple CUs, LDEV numbers are assigned according to the setting in the Interval list. • CU number of another SLPR is used.: Used to select the CU numbers of an SLPR other than the SLPR you are now in. • Back button: Returns to the Create V-VOL wizard pane (1) while maintaining settings in this pane.
Deleting virtual volumes 1. Change Command View XP or XP Remote Web Console to Modify mode. For instructions, see the HP StorageWorks Command View XP user guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000/SVS200. 2. On the V-VOL pane, select and right-click the V-VOL group containing the V-VOLs you want to delete in the V-VOL group tree, and select Delete V-VOL Group. A confirmation message appears. 3. Click OK.
Restoring Snapshot XP pairs Use the RAID Manager XP pairresync -restore command to restore Snapshot XP pairs. The Snapshot XP pair must be in PSUS status when you restore the pair. When the restoration is complete, the pair status changes to PAIR. For more information about the pairresync -restore command, see the HP StorageWorks RAID Manager XP user guide. CAUTION: If a failure occurs during the restoration, the pair status changes to PSUE. To recover the PSUE pair, delete the pair's snapshot data.
3. In the tree, select the port, host group, iSCSI target, or LUN containing the Snapshot XP pairs you want to delete. A list of pairs or volumes appears in the volume list. 4. Select and right-click the Snapshot XP pairs you want to delete, and select Pairsplit-S. The Pairsplit-S pane (Figure 17) appears. NOTE: You cannot delete a Business Copy XP pair and Snapshot XP pair at one time. 5. Click OK.
NOTE: For more information about the Pairsplit-S pane displayed when you select Business copy XP pairs, see the HP StorageWorks Business Copy XP user guide for the XP12000/XP10000/SVS200. Deleting Snapshot XP pairs by selecting pairs per pool 1. Launch Command View XP or XP Remote Web Console. 2. Change Command View XP or XP Remote Web Console to Modify mode.
Icon Description Array Pool in normal status Pool whose usage rate exceeds the threshold Blocked pool • Pool/volume list (upper-right area of pane): If you select Subsystem in the tree, the pool/volume list displays a list of pools in the array, including the following items: • Pool ID: Pool ID • Capacity(GB): Pool's storage capacity • Used Capacity(GB): Capacity of the pool the Snapshot XP pairs use • Usage rate: Pool's usage rate • Pool VOL(s): Total number of pool-VOLs in the pool • Snapshot pair(s): T
• Preset X(Y): Total number of operations displayed in the Preset list (X) and operation type (Y). • Shortcut menu (pool/volume list): When you select and right-click an operation in the Preset list, a pop-up menu with the Delete option appears. If you select Delete, you can cancel the selected operation. The canceled operation is deleted from the Preset list. • Apply button: Applies operations displayed in the Preset list to the array.
• MU: Snapshot ID • S-Vol: S-VOL's CU and LDEV numbers • Status: Snapshot XP pair status • Time: Time when snapshot data is stored in the pool • Pool used(GB): Pool capacity the S-VOL uses • Sync.: Consistency rate of the P-VOL and S-VOL data • CLPR(S): S-VOL's cache logical partition (CLPR) • Refresh button: Updates information in the Detail pane. • OK button: Closes the Detail pane. S-Vol Path Information pane 1. Display the Business Copy XP main pane. 2.
• OK button: Closes the S-Vol Path pane. Displaying operation history To display the history of operations on Snapshot XP pairs (such as creating pairs, deleting pairs, and storing snapshot data in the pool), use the History pane. 1. Launch Command View XP or XP Remote Web Console. 2. Click the Business Copy button. The Business Copy XP main pane appears. 3. Select the History tab. The History pane appears. NOTE: To update information on the History pane, click Refresh.
Table 22 Snapshot XP history reference codes and messages Code Message Description 0x2001 PAIR A Snapshot XP pair was created. 0x2011 PSUS A Snapshot XP pair was split. 0x2021 SMPL A Snapshot XP pair was deleted. 0x2030 COPY(RS-R) START Restoration of a Snapshot XP pair started. 0x2031 COPY(RS-R) END Restoration of a Snapshot XP pair ended normally. 0x2032 COPY(RS-R) ENDED ABNORMAL Restoration of a Snapshot XP pair ended abnormally. 0x2051 COPY(RS) Snapshot data was deleted.
Snapshot XP operations
6 Troubleshooting This chapter describes general troubleshooting for using the Command View XP or XP Remote Web Console and Snapshot XP. General troubleshooting You are responsible for the operations and usual maintenance of the Command View XP management station or XP Remote Web Console.
Table 23 Troubleshooting for Snapshot XP Problem Cause and solution Cannot install Snapshot XP. 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: • Contact your HP account support representative and check if the shared memory for the V-VOL management area and the differential tables is installed.
Problem Cause and solution Cannot create Snapshot XP pairs. Causes: • There are not enough differential tables to create pairs. • Conditions to create the pair are not fulfilled. • 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 Snapshot XP pairs. See Calculating the number of Snapshot XP pairs you can create. • Fulfill conditions to create the pair and try the pair creation again.
Problem Cause and solution A volume is blocked. Causes: • A failure occurred in two or more hard disk drives. • The breaker was turned off once and then the power supply was switched on. Solutions: • Contact your HP account support representative to solve the problem. A problem occurred on the application software installed in the host computer used to monitor the volumes. Causes: • Access to the volume is rejected. Solutions: • Terminate the application software that monitors the volumes.
4. Click OK. The confirmation message closes, and the pools on the array are restored. You can check whether the pool is recovered from the blocked status in the Pool pane. 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. You can also recover the pool by doing one of the following: • Add some pool-VOLs (see Creating new pools).
7. Click OK. The confirmation message closes, and the SIM complete process begins. It takes time if there are many SIMs to be completed. You can check whether the SIMs are completed successfully in Command View XP or XP Remote Web Console. For more information, see the HP StorageWorks Command View XP user guide for XP Disk Arrays or the HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000/SVS200.
Index A array capacity, 12 audience, documentation, 7 B battery backup, 34 blocked pools, recovering, 74 Business Copy XP, 12, 41 C calculating maximum number of pairs, 24 pool usage, 26 capacity, arrays, 12 capacity, pool, 17, 31, 33 Command View XP, troubleshooting, 71 conventions document, 8 text symbols, 8 copy processing, temporarily stopping, 19 Copy Threshold option, 19 COPY(RS-R) status, 31, 62 customer support, 8 D data copying operations, 12 deleting pairs, 20, 30, 31, 62 pools, 17, 53 V-VO
pairs calculating maximum number of, 24 creating, 18, 61 defined, 11 deleting, 20, 30, 31, 62 Detail pane, 66 differential tables, 24 History pane, 68 pools, creating, 17 recovering from blocked pools, 75 restoring, 19, 31, 62 speed, copying, 12 status, 30 troubleshooting, 73 pairsplit command, 61 pairsplit-S command, 31, 62 PFUL status, 31 Pool pane, 48 Pool tree, 49 pool-VOLs blocked, 74 capacity, 17, 31, 33 creating pools, 17 data copying operations, 12 deleting, 17 information about, 49 requirements, 16
V V-VOL pane, 54 V-VOLs calculating maximum number of pairs, 25 creating, 16, 17, 56 defined, 11 deleting, 61 groups, 58 recovering, 75 status, 56 virtual volumes.
