HP XP24000/XP20000 Snapshot User Guide Abstract This guide explains how to use HP XP Snapshot Software to create space-efficient point-in-time copies of data volumes on an HP XP24000/XP20000 storage system. Topics include creating, monitoring, and troubleshooting snapshot pools, virtual volumes, and copy pairs. The intended audience is a storage system administrator or authorized service provider with independent knowledge of HP XP storage systems and Remote Web Console.
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Contents 1 Overview of HP XP Snapshot Software..........................................................6 XP Snapshot............................................................................................................................6 Features..................................................................................................................................6 Benefits.........................................................................................................................
Starting XP Snapshot...............................................................................................................41 4 Using the XP Snapshot GUI........................................................................43 Pair Operation Window..........................................................................................................43 Volume List........................................................................................................................
Typographic conventions.......................................................................................................111 Glossary..................................................................................................113 Index.......................................................................................................
1 Overview of HP 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 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 Component (page 8) • XP Snapshot Operations (page 9) • Status of the XP Snapshot Pairs (page 13) • Copy Threshold Option (page 24) • Interoperability with Other Products and Functions (page 25) 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.
Use the XP Business Copy's Pair Operation window to see the status of the volume. Using RAID Manager, you can check the volume status by the pairdisplay command, but you cannot distinguish between an SMPL volume and an SMPL(PD) volume. To distinguish between an SMPL volume and an SMPL(PD) volume by using RAID Manager, you need to issue the inqraid command as well. The inqraid command will show you whether or not the volume is being used by XP Snapshot.
consistency group (3 in Figure 4 (page 12)), snapshot data of corresponding volume is stored (4 in Figure 4 (page 12)). You can also use the RAID Manager commands to store snapshot data by a consistency group. From XP Remote Web Console, you can only view the consistency groups. XP Snapshot does not support Quick Split mode. Therefore, even if you specify Quick Split mode, Quick Split mode does not take effect.
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 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands SSB B901 RAID Manager Command Cause of Error paircreate, pairresync, pairsplit An error has occurred during the XP Snapshot pair operation. For the cause, check the SSB being output together. 9685 paircreate Because there are no pair tables available, the XP Snapshot pair cannot be created. 9686 paircreate Because of the shortage of the differential tables, XP Snapshot pair cannot be created.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB 18 RAID Manager Command Cause of Error 971a paircreate Because the capacity of shared memory is insufficient, the pair cannot be created. 971b paircreate Because the capacity of shared memory is insufficient, the pair cannot be created. 971f pairresync -restore Because the volume you specified as the P-VOL has an S-VOL Disable attribute, XP Snapshot pair cannot be restored.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 972f paircreate Because you specified a V-VOL as the XP Snapshot P-VOL, the pair cannot be created. 9730 paircreate Because you specified a pool-VOL as the XP Snapshot P-VOL, the pair cannot be created.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error OPEN-V as the XP Snapshot S-VOL, the command ends abnormally. 20 9740 paircreate Because the volume you specified as the XP Snapshot S-VOL has the command device setting, the pair cannot be created. 9742 paircreate Because you specified an external volume as the XP Snapshot S-VOL, the pair cannot be created.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 9753 paircreate, pairsplit, pairresync, pairresync -restore Because the number of slots of the volumes you specified as the XP Snapshot P-VOL and S-VOL are different, the command ends abnormally. 9754 paircreate Because you specified the XP Thin Provisioning V-VOL as the XP Snapshot S-VOL, the XP Snapshot pair cannot be created.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB 975f RAID Manager Command All commands Cause of Error Because you specified the XP Auto LUN reserved volume as the XP Snapshot S-VOL, the command ends abnormally. For information on using XP Auto LUN, contact HP technical support (see (page 110)). 22 976a paircreate Unavailable parameter (unsupported parameter) is specified in the command.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error the XP Snapshot pair cannot be created. 9778 paircreate When the XP Snapshot P-VOL and XP Business Copy S-VOL share the volume, the XP Business Copy S-VOL you specified for the XP Snapshot P-VOL has consistency group settings. Therefore, the XP Snapshot pair cannot be created.
Table 5 SSBs and Causes of Error Issued Upon Rejection of RAID Manager Commands (continued) SSB RAID Manager Command Cause of Error 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 pair which uses the same P-VOL exists already in the specified consistency group.
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 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 XP RAID Manager User Guide.
create the XP Business Copy pair, you cannot set the consistency group to the XP Business Copy pair. • If a volume of an XP Snapshot pair has consistency group settings, you cannot use this volume to create an XP Business Copy Software pair. Also, if you use a volume of an XP Business Copy pair to create the XP Snapshot pair, you cannot set the consistency group to the XP Snapshot pair.
Table 9 XP Business Copy Operations for Shared XP Snapshot P-VOL/XP Business Copy P-VOL (continued) XP Business Copy Operations XP Snapshot Pair Status COPY PAIR PSUS SMPL (PD) COPY (RS) COPY (RS-R) PSUE Splitting pairs (pairsplit) Yes Yes Yes Yes Yes No Yes Forward pair resynchronization (pairresync) Yes Yes Yes Yes Yes No Yes Normal backward pair resynchronization (pairresync −restore) Yes Yes Yes Yes Yes No Yes Quick backward pair resynchronization (pairresync −restore) N
XP Continuous Access or XP Continuous Access Journal (page 29) and (page 29) 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 Access Journal volume. (page 30) and Page 30 show the relationship between the XP Snapshot pair status and XP Continuous Access or XP Continuous Access Journal operations for shared volumes.
1: SSWS is a status of XP Continuous Access Journal pairs. XP Continuous Access pairs will not change to SSWS status. 2: When you restore the XP Snapshot pair whose P-VOL is used as an XP Continuous Access or XP Continuous Access Journal S-VOL, you need to switch operations from the local site to the remote site by executing the horctakeover command.
HP XP Thin Provisioning Software If you are to use both XP Snapshot and XP Thin Provisioning in one storage system, note the following: • You cannot use pools for XP Thin Provisioning as pools for XP Snapshot, and vice versa. • If you create pools for XP Thin Provisioning, the number of the available pools for XP Snapshot decreases according to the number of XP Thin Provisioning pools.
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 16 S-VOL Requirements (continued) Item Requirement NOTE: A LUSE S-VOL must be paired with a P-VOL of the same size and the same structure. Emulation type OPEN-V Maximum number 16,384 Path definition Required Table 17 Pool-VOL Requirements Item Requirement Volume type Logical volume (LDEV) NOTE: Separating normal volumes and pool-VOLs into different parity groups is recommended for the best performance.
Table 17 Pool-VOL Requirements (continued) Item Requirement In addition, the volume already registered as a pool-VOL in a pool cannot be registered in another pool. Also note that if you create pools for XP Thin Provisioning, the number of available pools for XP Snapshot will decrease according to the number of XP Thin Provisioning pools. Volume capacity 8 GB to 4 TB. NOTE: Dividing a parity group into at least 16 is recommended for the best performance. Path definition Not required.
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. Compare the three calculation results. The smallest value is the maximum number of XP Snapshot pairs that can be created for the storage system.
Calculating the Number of XP Snapshot Pairs by Using the Shared Memory Capacity for the Virtual Volume Management Area The V-VOL management area consists of the following three elements: • Pool association information • Pool management block • Management information other than those above (shared memory is fixed to 10 MB) The shared memory of the V-VOL management area differs according to the additional shared memory. Table 18 (page 36) shows the detailed information.
S2 = [{(P ÷ 256) × 32} ÷ 8,736] 2,048] × 8,736 + [{(Y ÷ 256) ÷ 270} ÷ × 8,736 P: Total capacity of all pools (in kilobytes) Y: Total capacity of the pool-VOLs (in kilobytes) 256: Capacity of one slot (in kilobytes) 32: Capacity of the table which you need to manage the pool of one slot 8,736: Minimum size of the pool management block (in bytes) 270: Number of slots that can be managed by the slot management table 2,048: Number of slots that can be managed by the pool management block of the minimum si
Table 19 Rough Estimate of the Capacity of a P-VOL to be created If a Shared Memory is Added to And If the Pool Capacity is 4,096 GB 6,144 GB 8,192 GB 10,240 GB 12,288 GB 14,336 GB 20,480 GB 30,720 GB XP24000 XP 25.0 TB Disk Snapshot Array 1 10.5 TB — — — — — — — XP 42.0 TB Snapshot 2 28.0 TB 13.5 TB — — — — — — XP 100.0 Snapshot TB 3 85.0 TB 71.0 TB 56.0 TB 42.0 TB 28.0 TB 13.5 TB — — XP 164.0 Snapshot TB 4 149.0 TB 134.0 TB 120.0 TB 106.0 TB 92.0 TB 77.5 TB 29.
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. When you create a pool, you must estimate the copy capacity (that is, the capacity of the snapshot data to be copied to the pool) and set enough pool capacity for the estimated copy capacity.
If XP External Storage is installed, as well as internal volumes, external volumes can be used as pool-VOLs. However, external volumes are more likely to fail than internal volumes. In addition, solutions for external volume failures are more complicated than those for internal volume failures. To minimize the effects of the failures, HP recommends that you use external volumes as follows: • Specify the external volumes of only one external subsystem for one pool.
Installing and Uninstalling XP Snapshot This section describes the procedure for installing and uninstalling XP Snapshot. Installing XP Snapshot The 1. 2. 3. 4. following steps describe the installation procedure for XP Snapshot: Install additional shared memory for differential tables. Install additional shared memory for the V-VOL management area. Install XP Business Copy, which is the prerequisite program product for XP Snapshot. Install XP Snapshot.
3. Click the name of the window you want to display. XP Business Copy or LUN Expansion (LUSE)/Virtual LVI/LUN (VLL) starts, and the window whose name you clicked appears in the submenu. For details about the displayed windows, see Using the XP Snapshot GUI (page 43).
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 20 Pair Operation Window Items Item Description Display Filter button Displays the Display Filter dialog box ((page 64)) 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 20 Pair Operation Window Items (continued) Item Description 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. For details about the error codes of XP Snapshot, see HP XP24000/XP20000 Remote Web Console Error Codes. Cancel button Cancels all the operations set in the Preview list.
Table 21 Volume List Items (continued) Item Description P-VOL Displays information about 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 # indicates that the LDEV is an external volume (for example, 00:00:01#).
Table 21 Volume List Items (continued) Item Description HP XP24000/XP20000 Business Copy Software User Guide. Copy Pace Displays dotted lines (- - -). For information about what is displayed for an XP Business Copy pair, see the HP XP24000/XP20000 Business Copy Software User Guide. Sync. Displays the consistency rate of the P-VOL and the S-VOL for the XP Snapshot pair. Displayed information changes according to the pair status. See (page 47). Emulation Displays the emulation type of the volume.
Preview List The Preview list is in the lower right portion of the XP Business Copy's Pair Operation window. The Preview list displays the content of XP Business Copy or XP Snapshot operations that are not applied to the storage system yet. Figure 8 Preview List Table 24 Preview List Items Item Description P-VOL Displays information about the P-VOL in AAA-BB-CCC(XX:YY:ZZ) format.
Table 24 Preview List Items (continued) Item Description Copy Pace Displays dotted lines - - -. For information about what will be displayed for an XP Business Copy pair, see the HP XP24000/XP20000 Business Copy Software User Guide. 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.
the operation history of XP Business Copy pairs, see the HP XP24000/XP20000 Business Copy Software User Guide. The lower portion of the History window displays the following items. Table 25 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.
Table 26 XP Snapshot History Reference Codes and Messages (continued) Code Message Description 0x2031 COPY(RS-R) END Restoration of an XP Snapshot pair ended normally. 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.
Table 27 The XP Snapshot Window Display (continued) Item Description • Pool: X : pool whose usage rate exceeds the threshold (X indicates pool ID) • Pool: X : blocked pool (X indicates pool ID) Pool/volume list (in the upper right portion of the window) If you select Subsystem in the tree, the pool/volume list displays the list of the pools in the storage system. When you select Subsystem in the tree, the following items will be displayed in the pool/volume list.
Table 27 The XP Snapshot Window Display (continued) Item Description the V-VOL management area is used for pool management blocks, the maximum possible capacity of pool association information is decreased due to decrease in the remaining space of the V-VOL management area. Pool Mng. Block: X GB / Y GB X indicates the capacity of the pool management blocks in use. Y indicates the maximum possible capacity of the pool management blocks, including the capacity of the pool management blocks in use.
Table 27 The XP Snapshot Window Display (continued) Item Description successfully, the Preview list will be cleared. If an error occurs during an operation, the failed operation will remain in the Preview list. Details about the error (error code and message) are displayed on the error dialog box. For details about the list of the error code for XP Snapshot, see the HP XP24000/XP20000 Remote Web Console Error Codes. Cancel button Cancels all the operations set in the Preview list.
Table 28 Pool Window Description (continued) Item Description pool management blocks in use. The capacity of pool management blocks is calculated, based on the assumption that the remaining space of the V-VOL management area is used as pool management blocks. If the remaining space of the V-VOL management area is used for pool association information, the maximum possible capacity of pool management blocks is decreased due to decrease in the remaining space of the V-VOL management area.
Table 28 Pool Window Description (continued) Item Description • Protection: Data protection level SATA-W/V: Write and Verify method on SATA drives Standard: FC drives, flash drives, external volumes, or V-VOLs HP recommends that the data protection level be the same for pool-VOLs in the same pool. • PG: parity group to which the pool-VOL belongs • Encryption: Status of volume encryption Enable indicates the volume is encrypted. Disable indicates the volume is not encrypted.
Table 28 Pool Window Description (continued) Item Description XP24000/XP20000 External Storage Software User Guide. For information about XP Thin Provisioning, see the HP XP24000/XP20000 Thin Provisioning Software User Guide.
Table 28 Pool Window Description (continued) Item Description • Usage Rate: proportion of the used pool capacity to the total pool capacity (%) If the usage rate exceeds the threshold, Warning will be displayed after the usage rate. If the usage rate reaches 100 %, Error will be displayed after the usage rate. • You can set two thresholds for a pool; however, only one threshold is available for a pool in XP Snapshot. ◦ Threshold 1: Threshold for pool usage rate (%). Default setting is 80%.
Table 29 Menus of the Pool Tree (continued) Menu Function Restore Pool(s) Recovers multiple blocked pools to the normal status at the same time. You can select this menu command only when the blocked pools exist. However, note that you cannot select this command when the pool is blocked because its utilization ratio is 100% (that is, POOL FULL). When you right-click the pool icon: Change Pool Information Opens the Change Pool Information dialog box ((page 68)). Delete Pool Deletes the pool.
Table 30 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. The following icons are displayed in the tree. • : The storage system or a program product • : V-VOL group • : V-VOL group (in the process of being deleted) • : VDEV Menu When you select the icons in the V-VOL group tree and right-click them, the menus in Page 61 will be displayed.
Table 31 Menus of the V-VOL Group Tree Command Function New V-VOL Group Opens the New V-VOL Group dialog box ((page 72)). You can select this command only when you right-click the icon of the program product. To create V-VOLs for XP Snapshot, right-click the XP Snapshot icon. Delete V-VOL Group Deletes the V-VOL group and the V-VOLs that are in that V-VOL group. You can select this command only when you right-click the V-VOL group icon.
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 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 XP24000/XP20000 Business Copy Software User Guide. • XP Snapshot tab The check boxes that indicate the status of XP Snapshot pairs are displayed.
2. 3. Right-click XP Snapshot in the Pool tree of the Pool window ((page 54)). A menu is displayed. Select New Pool from the menu. The New Pool dialog box ((page 67)) is displayed. Enter the pool ID in the Pool ID text box. You can enter only a whole number from 0 to 127 in this text box. Do not enter any number that is already used for another pool. Select the threshold of the pool usage rate from the Threshold drop-down list.
Figure 15 New Pool Dialog Box The New Pool dialog box displays the following items. • Pool ID text box You can enter the pool ID in the text box. A whole number from 0 to 127 can be entered in the text box. Do not enter a pool ID that is already used by another pool. If you enter a pool ID that is already used by another pool and click Set, an error message will be displayed. In that case, enter a different number for the new pool ID.
4. Select the value for the threshold from the Threshold drop-down list. In the drop-down list, only the values that are higher than the pool usage rate are displayed. 5. Click OK. The Change Pool Information dialog box closes. 6. Click Apply. The confirmation message indicating if it is OK to apply the setting to the storage system is displayed. 7. Click OK. The confirmation message closes and the change of the setting is applied to the subsystem.
Deleting Multiple Pools CAUTION: If you execute the following operation, all the pools that can be deleted will be deleted. If there is any pool that you do not want to delete, you must delete one pool at a time by following the steps in Deleting a Pool (page 68). To delete multiple pools: 1. Change the mode of the Remote Web Console to Modify. If the mode is already changed to Modify, you can skip this step.
Optimizing the Pool Management Block If you optimize the pool management block, I/O performance of the pool will improve compared to before optimization. You can optimize the pool management block without changing the pools already created in the storage system. The procedure for optimizing the pool management block is the same as the procedure for optimizing the V-VOL management area. Therefore, follow the instructions in (page 69) to optimize the pool management block.
11. Enter the capacity of the V-VOL in the Capacity text box. • If the unit is megabytes (MB), you can enter only a whole number from 46 to 4194303. If the unit is blocks, enter a whole number from 96000 to 8589934592. If the unit is cylinders, enter a whole number from 50 to 4473924. • The V-VOLs you are creating will be used when you specify the S-VOLs of the XP Snapshot pairs.
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. Do not enter a V-VOL group ID that is already used by another V-VOL group. If you enter a V-VOL group ID that is already used by another V-VOL group and click Next, an error message will be displayed.
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.
• 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.: number ◦ Emulation: emulation type of the V-VOL ◦ Capacity: capacity of the V-VOL Back button Returns to the New V-VOL Group dialog box while maintaining the settings in this dialog box.
• ◦ Capacity: capacity of the V-VOL ◦ LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the V-VOL Select LDKC No. drop-down list You can select the LDKC number. • Select CU No. drop-down list You can select the CU number. • Interval drop-down list You can select the interval between the LDEV numbers that need to be assigned to the newly created V-VOLs. If you select 0, the LDEV numbers will be sequential.
Figure 20 Create V-VOL Wizard Dialog Box (3) • SSID tree Shows the LDKC numbers, CU numbers, SSID boundary and SSID in a hierarchical tree structure. The boundary area is a collection of LDEV numbers to which the SSID is assigned. For example, using the boundary area 00-FF, assign an SSID between LDEV numbers 00 to FF. A CU contains one or four boundary areas, which are fixed for each CU with factory settings. An SSID in parentheses is shown at the right of the boundary area (left column on screen).
• ◦ LDEV boundary: Boundary area of LDEV number where SSID is not assigned. ◦ SSID: Assigned SSID. The initial value is blank. Input SSID list Select or enter the SSID you want. You must be logged in as storage administrator to enter an SSID. • • Set ◦ Input SSID: Sets the SSID you select or input from the Input SSID list. ◦ Set SSID: Updates the SSID you select or input from the Input SSID list.
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. 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 XP24000/XP20000 Remote Web Console User Guide. 2. 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. 3.
dialog box is displayed again. If the specified V-VOL groups are not deleted, a dialog box is displayed.
The Delete V-VOL Groups dialog box displays the following items. • Attribute The name of the program product that is going to use the V-VOL groups is displayed. This is the name of the program product whose icon you right-clicked to display the Delete V-VOL Groups dialog box. • CLPR drop-down list You can select the CLPR of the V-VOL group. If All is selected, all V-VOL groups in all CLPRs are displayed.
Storing XP Snapshot Data Use the pairsplit command of the RAID Manager to store snapshot data in the pool. You can store 64 snapshot data at most per P-VOL. To store snapshot data, the pair status must be PAIR. When a P-VOL is paired with two or more volumes, make sure that none of the pairs is in COPY(RS-R) status. If some pairs are in the COPY(RS-R) status, the pairsplit command may end abnormally.
The XP Snapshot function is enabled automatically by specifying the consistency group number. 2. Execute the paircreate command again by specifying the same consistency group number specified in step 1. You can add pairs into the same consistency group. Repeat this step for each number of pairs that you want to specify into the same consistency group. 3. Execute the pairsplit command to the consistency group that is a target of the At-Time Snapshot function.
The restoration of the XP Snapshot pair sometimes ends abnormally for any of the following reasons: • ◦ The snapshot data of the XP Snapshot pair for restoration is being stored per consistency group. ◦ The P-VOL of the XP Snapshot pair for restoration is used as the P-VOL of another XP Snapshot pair, and the snapshot data of the latter XP Snapshot pair is being stored per consistency group.
Deleting XP Snapshot Data Use the pairresync command of the RAID Manager to delete snapshot data. You can store up to 64 snapshot data per P-VOL. Therefore, to store the new snapshot data in a P-VOL that already has 64 snapshot data, you need to delete the old snapshot data. If you delete snapshot data, free area in the pool will increase. To increase the free area in the pool, delete snapshot data by issuing the pairresync command on the XP Snapshot pairs in PSUS status.
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. • Page 96 • Procedure to Complete the Pool Related SIMs (page 97) • Page 98 If you have a problem with the Remote Web Console, see the HP XP24000/XP20000 Remote Web Console User Guide for troubleshooting information. Table 33 (page 94) shows problems that might occur when you are using XP Snapshot. The table also describes the causes of the problems and what you should do to solve the problems.
Table 33 Troubleshooting for XP Snapshot (continued) Problem Causes and Solutions exceeds the threshold again. For details about the procedure to complete SIMs, see Procedure to Complete the Pool Related SIMs (page 97). NOTE: You need unused volumes to add the pool volumes. If there is no unused volume, you need to create new volumes or ask HP technical support to add the hard disks. Therefore, it may take time to solve the problem. Cannot add pool-VOLs.
Table 33 Troubleshooting for XP Snapshot (continued) Problem Causes and Solutions Solutions: • Ask HP technical support to solve the problem. Trouble occurs on the application software installed in the host computer in order to monitor the volumes. Causes: • Access to the volume is rejected. Solutions: • Terminate the application software which monitors the volumes. • Change all the XP Snapshot pair statuses to PSUS, then start the application software to monitor the volumes.
6. Click OK. The confirmation message closes and the restoration of the pool is applied to the storage system. When there is more than one blocked pool, you may restore all the blocked pools at the same time by executing the following operation after you display the Pool window. 1. Select and right-click the XP Snapshot icon in the Pool tree in the Pool window. A menu is displayed. 2. Select the Restore Pool(s) command from the menu.
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 SIM completion process begins. It takes time if there are many SIMs to be completed. You can check whether the SIMs are completed successfully in the window of Remote Web Console. For details, see the HP XP24000/XP20000 Remote Web Console User Guide.
Table 34 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 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error 9719 All commands 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 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error 9728 paircreate, Since you specified the volume that is in process of formatting as the XP Snapshot P-VOL, the command ends abnormally. pairsplit, pairresync, pairresync pairresync 9729 paircreate, pairsplit, pairresync, pairresync pairresync - Since you specified the volume whose emulation type is other than OPEN-V as the XP Snapshot P-VOL, the command ends abnormally.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error XP Snapshot pair cannot be restored. 9734 pairresync restore Since XP Snapshot P-VOL and XP Continuous Access Journal S-VOL share the volume, the XP Snapshot pair cannot be restored. 9735 paircreate Since you specified XP Continuous Access Journal'S journal volume as the XP Snapshot P-VOL, the pair cannot be created.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error device setting, the pair cannot be created. 9742 paircreate Since you specified an external volume as the XP Snapshot S-VOL, the pair cannot be created. 9745 paircreate Since you specified the volume other than V-VOLs as the XP Snapshot S-VOL, the pair cannot be created. 9746 paircreate Since you specified a pool-VOL as the XP Snapshot S-VOL, the pair cannot be created.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error 9752 paircreate, Since the Max LBA size of the volumes you specified as the XP Snapshot P-VOL and S-VOL is different, the command ends abnormally. pairsplit, pairresync, pairresync restore 9753 paircreate, pairsplit, pairresync, pairresync - Since the number of slots of the volumes you specified as the XP Snapshot P-VOL and S-VOL is different, the command ends abnormally.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error XP Snapshot S-VOL, the command ends abnormally. 975c All commands Since you specified the XP Business Copy reserved volume as the XP Snapshot S-VOL, the command ends abnormally. 975d All commands Since you specified the XP Auto LUN source volume as the XP Snapshot S-VOL, the command ends abnormally.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error Journal S-VOL share the volume, the status of the XP Continuous Access Journal pair is COPY. Therefore, the snapshot data cannot be stored. 106 Troubleshooting 9771 paircreate Since you specified XP Continuous Access Journal delta resync pair volume as the XP Snapshot P-VOL, the XP Snapshot pair cannot be created.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error resynchronization. Therefore, the command ends abnormally. 977b paircreate, pairsplit 977c pairresync restore 977d pairresync restore When 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. Therefore, the command ends abnormally.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error restore 978a paircreate Since one of the following cases occurred, the XP Snapshot pair cannot be created by specifying the consistency number. • The specified consistency group number is in use for XP Business Copy. • The number of pairs has already exceeded the maximum number of pairs that can be created for one consistency group.
Table 34 Cause of Error and the Result of RAID Manager Command (SSB) (continued) SSB1 SSB2 RAID Manager Command Cause of Error 97a2 paircreate The command ended abnormally because the specified S-VOL used two mirrors in a 3DC multi-target or 3DC cascade configuration, which is a delta resync configuration consisting of three XP Continuous Access Journal sites.
7 Support and other resources Contacting HP HP technical support For worldwide technical support information, see the HP support website: http://www.hp.
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 35 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, 26 Auto LUN, 26 C calculating the maximum number of pairs, 34 Change Pool Information dialog box, 68 command device, 34 components, 8 conventions storage capacity values, 111 COPY, 14 Copy Threshold option, 24 COPY(RS), 14 Create V-VOL wizard dialog box (1), 73 Create V-VOL wizard dialog box (2), 74 Create V-VOL wizard dialog box (4), 78 New V-VOL Group dialog box, 72 number of differential tables calculating the number of XP Snapshot pairs, 35 O optional requirements, 34 P Pai
volume list, 45 volume requirements, 32 W websites HP, 111 HP Subscriber's Choice for Business, 110 product manuals, 111 X XP XP XP XP XP XP 116 Business Copy, 26 Continuous Access, 29 Continuous Access Journal, 29 Snapshot Software license requirements, 34 Snapshot window, 51 Thin Provisioning, 31 Index
