HP StorageWorks XP Snapshot User Guide for XP12000/XP10000 Disk Arrays and SVS 200 This guide provides information about understanding XP Snapshot and XP Business Copy, understanding XP Snapshot functions, and preparing to use, using, and troubleshooting XP Snapshot.
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Contents 1 Overview of copy solutions ................................................................. 7 XP Snapshot ............................................................................................................................... 7 XP Business Copy ....................................................................................................................... 9 2 XP Snapshot functions .......................................................................
5 XP Snapshot operations .................................................................... 41 Displaying the XP Business Copy main pane ................................................................................ Volume list ......................................................................................................................... Preset List ..........................................................................................................................
Figures 1 XP Snapshot mechanism ............................................................................................ 8 2 XP Snapshot pair and pool mechanism ...................................................................... 13 3 Procedure for using XP Snapshot ............................................................................... 27 4 XP Snapshot pair status transition .............................................................................. 29 5 XP Business Copy main pane ........
Tables 1 Requirements for XP Snapshot P-VOLs ........................................................................ 11 2 Requirements for XP Snapshot S-VOLs ........................................................................ 12 3 Requirements for XP Snapshot pool-VOLs .................................................................... 12 4 Requirements for using XP Snapshot ..........................................................................
1 Overview of copy solutions HP StorageWorks XP12000/XP10000/SVS200 arrays provide an extensive suite of data replication software. This chapter describes HP StorageWorks XP Snapshot. This chapter also covers portions of HP StorageWorks XP Business Copy because XP Snapshot is an integrated feature of XP Business Copy. NOTE: The use of XP Snapshot, XP Business Copy, and all other software products is governed by the terms of your license agreements with Hewlett-Packard.
Figure 1 XP Snapshot mechanism In Figure 1 on page 8, Data A is stored in the XP Snapshot pair's P-VOL. When the host requests to update Data A to Data B, XP Snapshot 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, XP Snapshot 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.
integrity is more important than copy process speed or array capacity. For a functional overview of XP Business Copy, see “Business Copy XP” on page 9. XP Business Copy Use XP Business Copy to maintain array-internal copies of all user data on the array for data on open systems such as UNIX and PC servers. XP Business Copy creates a pair of P-VOL and S-VOL, both of which are logical volumes in the same array or in externally attached storage.
Overview of copy solutions
2 XP Snapshot functions XP Snapshot creates pairs consisting of a P-VOL and S-VOL. When creating a pair, XP Snapshot 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 XP Snapshot uses first, and then describes XP Snapshot functions. Volumes XP Snapshot uses XP Snapshot uses the P-VOL, S-VOL, and pool-VOL.
XP Snapshot secondary volumes Table 2 Requirements for XP Snapshot S-VOLs Item Requirement V-VOL You cannot specify the following volumes as XP Snapshot S-VOLs: • Volumes used as a XP Snapshot pair's S-VOL Volume type • 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.
management area is automatically created when additional shared memory is installed. For more information about shared memory requirements, see Table 4 on page 19. To install additional shared memory, contact your HP account support representative. There are two areas in the V-VOL management area: pool management block and pool association information. When creating pools or XP Snapshot pairs, the pool management block or pool association information is stored in the V-VOL management area.
CAUTION: A pool's capacity equals the total capacity of the pool-VOLs registered in the pool. The XP Snapshot pair's status is PSUE (status when failure occurred) when the pool's usage rate exceeds the pool's capacity as a result of writing data in that pair's volume. You cannot store Snapshot data in the pool, and you cannot create XP Snapshot pairs. For more information about ensuring sufficient pool capacity, see “Notes on creating pools” on page 31.
Creating XP Snapshot pairs A XP Snapshot pair uses a V-VOL as its S-VOL. Therefore, you must create a V-VOL before creating a XP Snapshot pair. In XP Snapshot, you can specify up to 64 S-VOLs for a P-VOL. To create XP Snapshot pairs, use a XP RAID Manager command. For more information, see “Creating Snapshot XP pairs” on page 64. CAUTION: When creating XP Snapshot pairs, you decide which pool the pairs use.
If there are problems with the P-VOL data during a failure, you can restore the P-VOL to the normal state when the snapshot data was stored by executing restoration. To restore a XP Snapshot pair, use a RAID Manager command. For more information, see “Restoring Snapshot XP pairs” on page 64. Copy Threshold option: If the array's load increases, host server I/O performance (response) might be degraded.
NOTE: • After issuing the command to delete snapshot data, no more snapshot data for that XP Snapshot pair is stored in the pool, even if the host tries to write data in the P-VOL. To store snapshot data for that XP Snapshot pair again, you must issue the command for storing snapshot data. • The required time for deleting snapshot data or XP Snapshot pairs is several seconds, and sometimes more than 10 minutes.
XP Snapshot functions
3 Requirements for XP Snapshot operations This chapter describes requirements for using XP Snapshot, installing XP Snapshot, and calculating the number of pairs that XP Snapshot can create. Requirements for using XP Snapshot Table 4 Requirements for using XP Snapshot Item Requirement RAID level RAID1, RAID5, or RAID6 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.
2. Install additional shared memory for the V-VOL management area. When using an XP10000/SVS200, you do not need to install additional shared memory. You only need to define shared memory for the V-VOL management area. 3. Install XP Business Copy, which is a prerequisite for XP Snapshot. 4. Install XP Snapshot. NOTE: • Contact your HP account support representative to install additional shared memory for the VVOL management area.
• • • • • • XP Business Copy ShadowImage for z/OS Hitachi FlashCopy Mirroring Hitachi FlashCopy Mirroring Version 2 Flex Copy XP Auto LUN XP If you use any of these software products in the same array, calculate the number of differential tables XP Snapshot pairs can use by subtracting the number of differential tables the pairs use (migration plan for Auto LUN XP) for these software products from the number of differential tables for the whole array.
If a Shared Memory is Added to Shared Memory Capacity for the Whole V-VOL Management Area Extension 2 1,610,612,736 bytes Extension 3 2,147,483,648 bytes To calculate the maximum number of XP Snapshot pairs you can create for an array, use the following formula: Maximum number of XP Snapshot pairs = Total capacity of P-VOLs / { 4194304) x4194304} (Capacity of one P-VOL / 4194304: Unit by which pool association information manage the capacity of a P-VOL (in Kilobytes).
NOTE: You can check the capacity of the shared memory of pool association information and pool management block in the XP Snapshot pane. For details of the shared memory capacity for the whole V-VOL management area, see Table 5 on page 21.
Example S2= [{4398046511104 / (256 x 1024)} x (32 / 74784)] x 74784 = 7178.9542... x 74784 = 536874336 S1= 1073741824 536874336 8388608 = 528478880 Total capacity of P-VOLs (kB) = (528478880 / 74784) x 16384 x 256 = 7066.737... x 16384 x 256 = 7067 x 16384 x 256 = 29641146368 Maximum number of XP Snapshot pairs will be as follows: Maximum number of XP Snapshot pairs = 29641146368 / [ {(10 x 1024 x 1024) / 4194304} x4194304] = 29641146368 / 12582912 = 2355.666...
available pair tables for XP Snapshot pairs by subtracting the number of differential tables Hitachi FlashCopy Mirroring Version 2 pairs use from the number of pair tables for the whole array. For information about checking the number of pair tables Hitachi FlashCopy Version 2 uses (that is, the number of existing Hitachi FlashCopy Version 2 pairs), see the Hitachi ShadowImage for z/OS user guide.
Requirements for XP Snapshot operations
4 Using XP Snapshot This chapter describes procedures for using XP Snapshot. The first section describes the flow of XP Snapshot processes. The next section describes how the status of a XP Snapshot pair changes while using XP Snapshot. The other sections provide information needed to create pools and switch off the array's power supply after you start using XP Snapshot.
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.
Figure 4 XP Snapshot pair status transition 1. If a volume is not assigned to a XP Snapshot pair, its status is SMPL. 2. Issue the paircreate command on the SMPL volume to create a XP Snapshot 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.
3. Issue the pairsplit command on the XP Snapshot pair in PAIR status to store the snapshot data in the pool. When the operation completes, the pair status changes to PSUS. NOTE: If the pool capacity exceeds the threshold when a XP Snapshot pair is in PSUS status, the pair status changes to PFUS in XP RAID Manager. For more information, see the HP StorageWorks XP RAID Manager user guide. 4.
CAUTION: If the host computer uses application software to monitor the XP Snapshot pairs' volumes, problems, such as abnormal end, might occur. For example, since the S-VOL whose status is not PSUS (or PFUS) rejects access from the host, a problem might occur on the monitoring application software whose access is rejected. In addition, if the host computer connects to more than one port, a problem might also occur on ports that are not connected to the S-VOL that rejected the host access.
Defining pool capacity Pool capacity is the total capacity of pool volumes defined in the pool. If pool capacity is insufficient, the status of XP Snapshot pairs could change to PSUE. When creating a pool, you must estimate the copy capacity (for example, the capacity of snapshot data to be copied to the pool) and set enough pool capacity for the estimated copy capacity. If copy capacity changes according to the time period, set enough pool capacity for the largest copy capacity.
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. A volume in an external array is called an external LU. A volume in the local array is called an internal storage virtualizer LDEV (referred to as an internal LDEV).
Replacing the microprogram offline Replacing the microprogram is usually performed online, but in some cases, such as when the shared memory configuration must be changed, replacing the microprogram is performed offline. If you replace the microprogram offline, pool information or XP Snapshot pair information in shared memory is lost. Therefore, you must create pools and pairs again after replacing the microprogram.
NOTE: • You need LUN Security XP Extension to set the Read Only attribute, Protect attribute, S-VOL Disable, or VMA. For more information, see the HP StorageWorks LUN Security XP Extension user guide. • You need XP RAID Manager to set extents, Zero Read Capacity, or Invisible attribute. For more information, see the HP StorageWorks XP RAID Manager user guide.
XP Snapshot operations XP Business Copy pair status1 COPY PAIR COPY(SP) PSUS(SP) PSUS COPY(RS) COPY(RSR) PSUE Storing snapshot data (pairsplit) No No No No OK No No No Restoring pairs (pairresync -restore) No No No No OK No No No Deleting snapshot data (pairresync) OK OK OK OK OK OK OK OK Deleting pairs (pairsplit -S) OK OK OK OK OK OK OK OK 1 OK: Operation allowed. No: Operation not allowed (command rejected).
XP Business Copy operations Deleting pairs (pairsplit -S) XP Snapshot pair status1 COPY PAIR PSUS SMPL(PD) COPY(RS) COPY(RSR) PSUE OK OK OK OK OK OK OK 1 OK: Operation allowed. No: Operation not allowed (command rejected).
Combining XP Snapshot with Continuous Access XP or Continuous Access XP Journal When the XP Snapshot P-VOL and the Continuous Access XP or Continuous Access XP Journal pair volume are shared, the relationship between the Continuous Access XP or Continuous Access XP Journal pair status and XP Snapshot operations is shown in Table 14 on page 38 and Table 15 on page 38.
The relationship between the XP Snapshot pair status and Continuous Access XP or Continuous Access XP Journal operations is shown in Table 16 on page 39 and Table 17 on page 39.
Combining XP Snapshot with Auto LUN XP Regardless of the status of Auto LUN XP's migration plans (Auto LUN XP pairs), you cannot perform any Snapshot operations on the volume the migration plan uses. To use a XP Snapshot P-VOL as the migration plan's source volume, you must create the XP Snapshot pair first, and then create the migration plan. When the XP Snapshot P-VOL and migration plan's source volume are shared, you can execute the migration plan only when the XP Snapshot pair is in PAIR status.
5 XP Snapshot operations This chapter describes XP Snapshot operations and panes. Displaying the XP Business Copy main pane 1. 2. Launch Command View XP or XP Remote Web Console. Click the Business Copy ( ) button. The XP Business Copy main pane appears. Figure 5 XP Business Copy main pane NOTE: Although the XP Business Copy main pane displays information about XP Business Copy and XP Snapshot pairs, this section only explains items related to XP Snapshot pairs.
• Tree (left area of pane): Displays ports that are defined paths, host groups, iSCSI targets, or LUNs in a tree format. When you select items in the tree, information about XP Business Copy or XP Snapshot pairs appears in the volume list on the right of the pane. To display information about all pairs in the array, select Subsystem at the top of the tree. The following icons appear in the tree.
Figure 6 Volume list When you select a port, host group, iSCSI target, or LUN in the tree on the left side of the XP Business Copy 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.
• MU: XP Snapshot pair's snapshot ID. If the pair is in SMPL status, three hyphens (---) appear. For more information about what is displayed for XP Business Copy pairs, see the HP StorageWorks XP Business Copy user guide for the XP12000/XP10000/SVS200. • Status: XP Snapshot or XP Business Copy pair status. For more information about XP Snapshot pair status, see “Status of Snapshot XP pairs” on page 28.
• CLPR(S): S-VOL's cache logical partition. • Shortcut menu: When you select XP Snapshot pair volumes in the volume list and right-click, a shortcut menu appears. Table 19 Shortcut menu in volume list Command Function Detail Opens the Detail pane (Figure 19 on page 69). Pairsplit-S Opens the Pairsplit-S pane (Figure 17 on page 66). S-Vol Path Opens the S-Vol Path pane (Figure 20 on page 70). Display Filter Opens the Display Filter pane (Figure 8 on page 48).
Preset List The Preset list is in the lower-right area of the XP Business Copy main pane. The Preset list displays the content of XP Business Copy or XP Snapshot operations that have not been applied to the array yet. Figure 7 Preset List The Preset list displays the following items: • Port: P-VOL's port ID (cluster and channel number). • G-ID: Group number of the P-VOL's host group or iSCSI target. • LUN: P-VOL's CU:LDEV (control unit image:logical device ID).
NOTE: Grayed out commands are for XP Business Copy pairs. For more information about these commands, see the HP StorageWorks XP Business Copy user guide for the XP12000/XP10000/SVS200. • Preset X(Y) • X: Total number of operations in the Preset list. • Y: Operation type. Specifying conditions for volumes displayed in the volume list You can display only the specified volumes in the volume list if you specify the conditions in the Display Filter pane. To display the Display Filter pane: 1.
Figure 8 Display Filter pane (XP Snapshot tab selected) NOTE: • For more information about the XP Business Copy tab on the Display Filter pane, see the HP StorageWorks XP Business Copy user guide for the XP12000/XP10000/SVS200. • Filter settings are only effective within the current operations in the XP Business Copy 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.
• XP Snapshot: Displays or hides XP Snapshot pairs. NOTE: If the check box is not selected, all check boxes in both tabs are grayed out. • Business Copy tab: This tab is for XP Business Copy pairs. For more information, see the HP StorageWorks XP Business Copy user guide for the XP12000/XP10000/SVS200. • XP Snapshot tab: Check boxes indicate the status of Snapshot pairs displayed. If you select or clear a check box, XP Snapshot pairs in that status are displayed or hidden in the volume list.
NOTE: The capacity of the pool management block in use must be less than its total capacity. • Pool Mng. Block used capacity: X GB: Capacity of pool management blocks in use. 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.
Menu When you right-click the pool icon Function Change Pool Information Opens the Change Pool Information pane (Figure 11 on page 55). Delete Pool Deletes the pool. Restore Pool Restores the blocked pool to the normal status. You can select this command only when you rightclick a blocked pool icon. • Pool-VOL: Information about pool-VOLs registered in the pool selected in the Pool tree.
• Warning: Pool's usage rate exceeds the threshol • Blocked: Pool is blocked • Total Capacity: Pool's total capacity • Used Capacity: Pool's used capacity • Usage Rate: Proportion of used pool capacity to total pool capacity (%). If the usage rate exceeds the threshold, Warning appears after the usage rate. If the usage rate reaches 100%, Error appears after the usage rate.
4. Select the pool usage rate threshold from the Threshold list. CAUTION: If the pool's usage rate exceeds the threshold, you cannot create new XP Snapshot pairs. Ensure that you do not set the threshold at too small a value. 5. Select XP Snapshot from the Attribute list. 6. Check the setting contents. If there is no problem, click Set. The New Pool pane closes, and the new pool appears in the Pool tree. 7. Select the pool in the Pool tree. 8.
Figure 10 New Pool pane • Pool ID: Pool ID. Enter a number from 0 to 127. NOTE: Do not enter a pool ID that another pool is already using. If you enter a pool ID that another pool is already using and click Set, an error message appears. In that case, enter a different number for the new pool ID. • Threshold: Threshold of the pool usage rate between 20 and 95. NOTE: The threshold unit is percent (%). If the pool usage rate exceeds the threshold, the pool status changes to Warning.
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. Figure 11 Change Pool Information pane Items in the Change Pool Information pane are the same as those in the New Pool pane. However, in the Change Pool Information pane, you cannot enter or select items other than the Threshold list.
2. On the Pool pane, select and right-click the XP Snapshot 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. Click OK. The confirmation message closes, and the pools are deleted from the array.
3. Click the V-VOL tab. The V-VOL pane appears. 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.
Command Function Delete V-VOL Group Deletes the V-VOL group and V-VOLs in that V-VOL group. You can select this command only when you right-click a V-VOL group icon. • V-VOL list (right area of the pane): Information about V-VOLs registered in the VDEV selected in the V-VOL group tree.
6. Click Next. The Create V-VOL wizard pane (1) (Figure 14 on page 61) appears. 7. Select the V-VOL's emulation type from the Emulation Type list. 8. Select the V-VOL's capacity unit from the Capacity Unit list. The selected unit appears after the Capacity box. 9. Enter the V-VOL's capacity in the Capacity box. NOTE: • If the unit is megabyte (MB), you can enter only a whole number from 46 to 2097151. If the unit is block, enter a whole number from 96000 to 4294967296.
16. Select the area in the Select LDEV No. area. The color of the selected area changes to blue. CU and LDEV numbers are added to the V-VOL information setting list, and blue italics changes to black normal. To set multiple V-VOLs, repeat step 13 through step 16. 17. Click Next. The Create V-VOL wizard pane (3) (Figure 16 on page 63) appears. 18. Check the settings. If there is no problem, click OK. The Create V-VOL wizard pane (3) closes, and the V-VOL pane appears.
Figure 14 Create V-VOL wizard pane (1) • • • • • • • • V-VOL Group: V-VOL group ID set in the New V-VOL Group pane. Emulation Type: V-VOL's emulation type. Capacity Unit: V-VOL's unit of capacity: MB (megabyte), block, or Cyl. Capacity: V-VOL's capacity. If you selected MB from the Capacity Unit list, enter a whole number from 46 to 2097151. If you selected block, enter a whole number from 96000 to 4294967296. If you selected Cyl, enter a whole number from 50 to 2236962.
Figure 15 Create V-VOL wizard pane (2) • V-VOL Group: V-VOL group ID. • V-VOL information setting list (upper-right area of pane): Information about the V-VOLs you are creating. • No.: Number • Emulation: V-VOL's emulation type • Capacity: V-VOL's capacity • CU:LDEV: V-VOL's CU and LDEV numbers • Select LDEV No.: Settings of LDEV numbers for the CU number selected in Select CU No. Numbers in the upper end and left side indicate the LDEV number.
• Cancel button: Cancels the setting in the Create V-VOL wizard pane (2), and closes the pane. Figure 16 Create V-VOL wizard pane (3) • V-VOL information setting list (middle of pane): Information about the V-VOLs you are creating. • VDEV: VDEV number • Emulation: V-VOL's emulation type • Capacity: V-VOL's capacity • CU:LDEV: V-VOL's CU and LDEV numbers • Back button: Returns to the Create V-VOL wizard pane (2) while maintaining settings in this pane.
5. Click OK. The confirmation message closes, and the V-VOL group is deleted in the array. NOTE: You cannot delete the V-VOL if it is used as a XP Snapshot pair's S-VOL. To delete a V-VOL used as an S-VOL, first delete the pair. Creating XP Snapshot pairs Use the XP RAID Manager paircreate command to create XP Snapshot pairs.
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. When you recover the PSUE pair by deleting its snapshot data, the P-VOL's data is not guaranteed. Therefore, you must overwrite the P-VOL with backup data or format the P-VOL. NOTE: XP Snapshot does not support Quick Restore mode. Therefore, even if you specify Quick Restore mode, Quick Restore mode does not take effect.
2. Display the XP Business Copy main pane. 3. In the tree, select the port, host group, iSCSI target, or LUN containing the XP Snapshot pairs you want to delete. A list of pairs or volumes appears in the volume list. 4. Select and right-click the XP Snapshot pairs you want to delete, and select Pairsplit-S. The Pairsplit-S pane (Figure 17 on page 66) appears. NOTE: You cannot delete a XP Business Copy pair and XP Snapshot pair at one time. 5. Click OK.
NOTE: For more information about the Pairsplit-S pane displayed when you select XP Business Copy pairs, see the HP StorageWorks XP Business Copy user guide for the XP12000/XP10000/SVS200. Deleting XP Snapshot 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 XP Snapshot pairs use • Usage rate: Pool's usage rate • Pool VOL(s): Total number of pool-VOLs in the pool • Snapshot pair(s): T
The Preset list displays the following items: • P-Vol: P-VOL's port ID, group number of the host group or iSCSI target, and LUN. • MU: Snapshot ID. • S-Vol: S-VOL's port ID, group number of the host group or iSCSI target, and LUN. • Code: Cause of error. If there is no error, --- appears. • Preset X(Y): Total number of operations displayed in the Preset list (X) and operation type (Y).
• • • • • • • • Type: P-VOL's emulation type. Capacity(MB): P-VOL's capacity. The unit is megabyte (MB). Blocks: Number of blocks the P-VOL uses. CLPR(P): P-VOL's cache logical partition (CLPR). Pool ID: Pool ID of the pool in which the P-VOL is registered. Amount of pool use by P-Vol(GB): Amount of pool capacity the P-VOL used. Pool usage rate by P-Vol: P-VOL's pool usage rate.
• • • • • G-ID(P): Group number of the P-VOL's host group or iSCSI target LUN(P): P-VOL's LUN Port(S): S-VOL's port ID G-ID(S): Group number of the S-VOL's host group or iSCSI target LUN(S): S-VOL's LUN • S-Vol Path Information: The following S-VOL path information for the selected XP Snapshot pair appears: • Port: S-VOL's port ID • G-ID: Group number of the S-VOL's host group or iSCSI target • LUN: S-VOL's LUN • OK button: Closes the S-Vol Path pane.
The lower area lists the operation history of XP Snapshot pairs. • Time: Date and time (YYYY/MM/DD hour/min/sec) when a XP Snapshot pair or volume operation was performed. • P-Vol: CU and LDEV number of the P-VOL used for XP Snapshot operations. • S-Vol: CU and LDEV number of the S-VOL used for XP Snapshot operations. When there is no SVOL, --- appears. • MU: ID of snapshot data used for XP Snapshot operations. • Pool: Pool ID of the pool in which the XP Snapshot pair is registered.
6 Troubleshooting This chapter describes general troubleshooting for using the Command View XP or XP Remote Web Console and XP Snapshot. General troubleshooting You are responsible for the operations and usual maintenance of the Command View XP management station or XP Remote Web Console.
Troubleshooting XP Snapshot Table 24 on page 74 shows problems that are likely to occur when using XP Snapshot. The table describes the causes of the problems and what you should do to solve the problems. Table 24 Troubleshooting for XP Snapshot Problem Cause and solution 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. Cannot install XP Snapshot.
Problem Cause and solution Causes: • Too much snapshot data is stored in the pool. • Pool capacity is too small. • Pool threshold is too small. Solutions: • Delete snapshot data that is less important or delete old snapshot data to decrease the pool usage rate. See “Restoring Snapshot XP pairs” on page 64. • Add some pool volumes to increase the pool capacity. See “Creating new pools” on page 52. Pool usage rate exceeds the threshold. • Set the pool threshold to a larger value.
Problem Cause and solution Causes: • XP Snapshot pairs are not created. XP Snapshot pairs are not displayed in the volume list. • Displaying XP Snapshot pairs is prohibited by the filtering function. Solutions: • Create XP Snapshot pairs. See “Creating Snapshot XP pairs” on page 64. • Change the settings in the Display Filter pane. See “Specifying conditions for volumes displayed in the volume list” on page 47. Causes: • A volume is blocked because a failure occurred in the hard disk drive.
Recovering blocked pools When a pool is blocked, you must recover the pool-VOLs, pool, XP Snapshot pairs, and V-VOLs in this order. This section describes the procedure to recover the blocked pool. Recovering pool-VOLs If the pool-VOL is blocked, contact your HP account support representative. Recovering pools 1. Click the Volume Manager button. The Volume Manager pane appears. 2. Select the Pool tab. The Pool pane appears. 3.
Recovering V-VOLs When the V-VOL is blocked, contact your HP account support representative. Completing pool-related SIMs When the pool's usage rate exceeds the threshold or when the pool is blocked, the following Service Information Messages (SIMs) occur: • When the usage rate of the pool exceeds the threshold: Reference code 6000XX • When the pool is blocked: Reference code 6001XX XX indicates the pool ID. For more information about SIM reference codes, contact your HP account support representative.
7 Support and other resources Related documentation The following documents provide related information: HP StorageWorks XP glossary HP StorageWorks XP Remote Web Console user guide for XP12000/XP10000/SVS200 HP StorageWorks Auto LUN XP user guide for the XP12000/XP10000 HP StorageWorks XP Business Copy user guide for the XP12000/XP10000/SVS200 HP StorageWorks Continuous Access XP user guide for the XP12000/XP10000/SVS200 HP StorageWorks Continuous Access XP Journal user guide HP StorageWorks External Stora
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Index A array capacity, 8 B battery backup, 33 blocked pools, recovering, 77 C calculating maximum number of pairs, 20 pool usage, 23 capacity, arrays, 8 capacity, pool, 13, 30, 31 Command View XP, troubleshooting, 73 copy processing, temporarily stopping, 16 Copy Threshold option, 16 COPY(RS-R) status, 30, 64 D data copying operations, 8 deleting pairs, 16, 28, 30, 65 pools, 13, 55 V-VOLs, 63 Detail pane, 69 differential tables, 20 Display Filter pane, 47 document related documentation, 79 documentation
pairs calculating maximum number of, 20 creating, 15, 64 defined, 7 deleting, 16, 28, 30, 65 Detail pane, 69 differential tables, 20 History pane, 71 pools, creating, 13 recovering from blocked pools, 77 restoring, 15, 30, 64 speed, copying, 8 status, 28 troubleshooting, 75 pairsplit command, 64 pairsplit-S command, 30, 65 PFUL status, 29 Pool pane, 49 Pool tree, 50 pool-VOLs blocked, 77 capacity, 13, 30, 31 creating pools, 13 data copying operations, 8 deleting, 13 information about, 51 requirements, 12 po
V V-VOL pane, 56 V-VOLs calculating maximum number of pairs, 21 creating, 12, 14, 58 defined, 7 deleting, 63 groups, 60 recovering, 77 status, 58 virtual volumes.
