HP StorageWorks XP24000 Snapshot User's Guide Part number: T5213-96003 First edition: June 2007
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Contents About this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . Intended Audience . . . . . . . . . . Related Documentation . . . . . . . . Document Conventions . . . . . . . . Conventions for Storage Capacity Values Window Illustrations . . . . . . . . . HP Technical Support . . . . . . . . . Subscription Service . . . . . . . . . HP Websites . . . . . . . . . . . . Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calculating the Number of XP Snapshot Pairs by Using the Performance Considerations . . . . . . . . . . . . . . . Notes on Defining Pool Capacity . . . . . . . . . . . . . Notes on Using External Volumes as Pool-VOLs . . . . . . . Requirements for Maintaining XP Snapshot . . . . . . . . . . Notes on Replacing the Microcode Offline . . . . . . . . Notes on Switching Off the Power Supply . . . . . . . . . Installing and Uninstalling XP Snapshot . . . . . . . . . . . . Installing XP Snapshot . . . . . . . . . .
Figures 1 ..The Mechanism of XP Snapshot . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2 ..The Mechanism of an XP Snapshot Pair and a Pool . . . . . . . . . . . . . . . . . 12 3 ..XP Snapshot Pair Status Transitions . . . . . . . . . . . . . . . . . . . . . . . . 15 4 ..Pair Operation Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5 ..Volume List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 ..Preview List . . . . . . . . . . . . . . . . . . . . .
Tables 1 ..Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 ..Whether Hosts Can Access P-VOL and S-VOL . . . . . . . . . . . . . . . . . . . 16 3 ..Pair Statuses and the Results of the RAID Manager Commands . . . . . . . . . . . . 17 4 ..Volume Sharing with Other Program Products 6 . . . . . . . . . . . . . . . . . . . 18 5 ..XP Snapshot Operations When XP Snapshot P-VOL and Business Copy P-VOL Are Shared 19 6 ..
About this Guide This user's guide describes and provides instructions for performing XP Snapshot operations on the HP storage system using the XP Snapshot feature option. The term storage system in this guide refers to an HP StorageWorks XP24000 Disk Array.
• • • • • 1 1 1 1 1 KB (kilobyte) = 1,024 bytes MB (megabyte) = 1,0242 bytes GB (gigabyte) = 1,0243 bytes TB (terabyte) = 1,0244 bytes block = 512 bytes Window Illustrations The windows shown in this guide were displayed on a Windows computer with the Internet Explorer browser. The windows may appear different on your computer depending on the operating system and browser being used. Window contents also vary depending on installed program products and the storage system being managed.
1 Overview of HP StorageWorks XP Snapshot The HP storage system provides various copy solutions (program products) such as HP StorageWorks XP Continuous Access Software and HP StorageWorks XP External Storage Software. Among these solutions, this chapter provides an overview of XP Snapshot and HP StorageWorks XP Business Copy Software, which is a prerequisite program product of XP Snapshot.
Data A has completed, Data B will be written to the part where Data A was stored in the P-VOL, and the P-VOL will be updated. From the S-VOL, you can access Data B in the P-VOL and Data A in the pool-VOL. XP Snapshot and Business Copy are similar because both program products create pairs. However, S-VOLs of an XP Snapshot pair do not consume the capacity of the storage system because the S-VOLs are actually virtual volumes. Therefore, XP Snapshot reduces the capacity used by the storage system as a whole.
2 About XP Snapshot Operations When XP Snapshot is used, it creates pairs consisting of a P-VOL and an S-VOL. When creating a pair, XP Snapshot uses a V-VOL as the S-VOL of the pair. In addition, the snapshot data of the P-VOL can be managed by copying the data to the area called a pool. This chapter describes the volumes used by XP Snapshot first, and then describes the functions of XP Snapshot. XP Snapshot Component A system using XP Snapshot usually contains the following components.
RAID Manager Part of XP Snapshot operations require RAID Manager. When you use RAID Manager, you do not need to use the Remote Web Console computer. Instead, you operate XP Snapshot directly from the host by executing the commands. XP Snapshot Operations This section describes the main operations of XP Snapshot. Create V-VOL Management Area Operation A V-VOL management area needs to be created in the shared memory before you use XP Snapshot.
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. Snapshot data cannot be stored in the pool, and no XP Snapshot pair can be created. Please read the notes in “Notes on Defining Pool Capacity” on page 31 and ensure that there is sufficient pool capacity.
Use 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.
• The required time for deleting snapshot data or XP Snapshot pairs is several seconds, and sometimes more than ten minutes. The time will increase if the deleted pair uses a large amount of the pool, or if multiple pairs are deleted at one time. • When you delete an XP Snapshot pair, the status of the volumes becomes SMPL(PD). Use Business Copy’s Pair Operation window to see the status of the volume.
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, and the pair status will change to PAIR when the operation completes. Notes: • If you execute the paircreate command immediately after deleting the last snapshot data of the P-VOL, it may take time to create a new pair. • If the pool capacity exceeds the threshold when an XP Snapshot pair is in PAIR status, the pair status changes to PFUL in RAID Manager.
also occur on the ports that are not connected to the S-VOL that rejected the host access. You need to terminate the application software which monitors the volumes in order to solve these problems. Use RAID Manager commands to operate XP Snapshot pairs. However, whether or not the operations complete normally depends on the status of the pairs. The table below shows the pair statuses and the results of the RAID Manager commands.
• HP StorageWorks XP for FlashCopy Mirroring Software Version 1 • HP StorageWorks XP for FlashCopy Mirroring Software Version 2 • HP StorageWorks Auto LUN Software Interoperability with Other Products and Functions XP Snapshot can create pairs by sharing volumes with other program products, such as Business Copy or Continuous Access. In addition, you can create XP Snapshot pairs by using volumes to which attributes are assigned by HP StorageWorks XP Data Retention Utility or RAID Manager.
Data Retention Utility Data Retention Utility can set four different kinds of access attributes on the volumes: Read/Write, Read Only, Protect, and S-VOL Disable. XP Snapshot 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 P-VOL of the XP Snapshot pair, you cannot restore the pair.
OK: Operation is allowed. No: Operation is not allowed (command rejected). N/A: Not applicable.
Table 8 Business Copy Operations When XP Snapshot P-VOL and Business Copy S-VOL Are Shared Business Copy Operations XP Snapshot Pair Status COPY PAIR PSUS SMPL (PD) COPY (RS) COPY (RS-R) PSUE Creating pairs (paircreate) No No No No No No No Creating and splitting pairs (paircreate −split) No No No No No No No Splitting pairs (pairsplit) OK OK OK OK OK No OK Forward pair resynchroniza tion (pairresync) OK OK OK OK OK No OK Normal backward pair resynchronization (pairre
Table 10 XP Snapshot Operations When XP Snapshot P-VOL and Continuous Access / Continuous Access Journal S-VOL Are Shared XP Snapshot Operations Continuous Access / Continuous Access Journal Pair Status COPY PAIR PSUS PSUE SSWS*1 Suspending Deleting Creating pairs (paircreate) OK OK OK OK OK OK OK Storing snapshot data (pairsplit) No OK OK OK OK OK OK Restoring pairs (pairresync −restore) *2 No No No No No No No Deleting snapshot data (pairresync) OK OK OK OK OK OK OK
Table 12 Continuous Access / Continuous Access Journal Operations When XP Snapshot P-VOL and Continuous Access / Continuous Access Journal S-VOL Are Shared Continuous Access / Continuous Access Journal Operations XP Snapshot Pair Status COPY PAIR PSUS SMPL (PD) COPY (RS) COPY (RS-R) PSUE Creating pairs (paircreate) No No No OK No No No Splitting pairs (pairsplit) OK OK OK OK OK OK OK Resynchronizing pairs (pairresync) OK OK OK OK OK No OK Deleting pairs (pairsplit −S) OK OK
About XP Snapshot Operations
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. Please read this chapter before you start the operation of XP Snapshot. System Requirements XP Snapshot operations involve the storage system containing the primary and secondary volumes and the licensed XP Snapshot and Business Copy feature enabled on Remote Web Console.
Table 14 Requirements of the S-VOL of XP Snapshot Item Requirement Volume type V-VOL You cannot specify the following volumes as XP Snapshot S-VOLs. • Volumes used as S-VOLs of XP Snapshot pairs • Volumes used by a pair or migration plan of another program product Note: A LUSE S-VOL must be paired with a P-VOL of the same size and the same structure.
As for the RAID level, XP Snapshot supports RAID1, RAID5, and RAID6. XP Snapshot Software Requirements To use XP Snapshot, all storage system hardware, microcode, and software required for Business Copy operations must be installed and enabled. You also need to purchase the license key for Business Copy and install it in Remote Web Console. For detailed information about the license key and software installation, see the HP StorageWorks XP24000 Remote Web Console User’s Guide.
Calculating the Number of XP Snapshot Pairs by Using the Number of Differential Tables If additional shared memory is installed, the maximum number of differential tables will be 26,176 or 57,600 or 104,768 or 146,688 or 209,600. To calculate the number of XP Snapshot pairs that can be created, calculate the number of differential tables required for the XP Snapshot pair and compare it with the number of differential tables of the whole subsystem.
Table 16 Additional Shared Memory for the V-VOL Management Area Shared Memory Shared Memory Capacity XP Snapshot 1 751,619,276 bytes XP Snapshot 2 1,073,741,823 bytes XP Snapshot 3 2,147,483,647 bytes To calculate the maximum number of XP Snapshot pairs that can be created for a subsystem, use the formula below: Maximum number of XP Snapshot pairs = Total capacity of P-VOLs ÷ {↑(Capacity of one P-VOL ÷ 512)↑ × 512} 512: Unit by which pool association information manages the capacity of a P-VOL (in
Note that you must round up the value enclosed by the two upward arrows (↑) to the nearest whole number. To calculate P (total capacity of all pools), use the formula below: P = Y – (4,116,000 + 84,000 × Number of pool-VOLs) Notes on calculating the usage of a pool: • When copying snapshot data to the pool, XP Snapshot always consumes a multiple of 256 kB of the capacity of the pool. 256 kB will be consumed even if the snapshot data is smaller than 256 kB.
According to the result above, the maximum number of XP Snapshot pairs that can be created is 1,018,575. Performance Considerations If XP Snapshot performs restore operation when the load of the subsystem is heavy, it is more likely that host server I/O performance (response) may be degraded. The Copy Threshold option allows you to effectively decrease the load of the subsystem. For details, see “Copy Threshold Option” on page 17.
Notes on Using External Volumes as Pool-VOLs By using External Storage, you can connect multiple storage systems to a storage system. In that case, the original storage system is called the local subsystem, and the connected storage systems are called external subsystems. A volume in an external subsystem is called an external volume. A volume in the local subsystem is called an internal volume. If External Storage is installed, as well as internal volumes, external volumes can be used as pool-VOLs.
Installing and Uninstalling XP Snapshot This section describes the procedure for installing and uninstalling XP Snapshot. Installing XP Snapshot The installation procedure for XP Snapshot is described below. 1. 2. 3. 4. Install Install Install Install additional shared memory for differential tables. additional shared memory for the V-VOL management area. Business Copy, which is the prerequisite program product of XP Snapshot. XP Snapshot.
For details about the displayed windows, see “Using the XP Snapshot GUI” on page 35.
4 Using the XP Snapshot GUI XP Snapshot uses the windows displayed by clicking the Remote Web Console’s starting menu of Business Copy and LUN Expansion (LUSE) / Virtual LVI/LUN (VLL). However, note that XP Snapshot uses only the Pair Operation window, the History window, and the XP Snapshot window among the Business Copy windows. Among LUN Expansion (LUSE) / Virtual LVI/LUN (VLL) windows, XP Snapshot uses only the Pool window and the V-VOL window.
Displays the ports that are defined paths or host groups, in tree style. When you select the items in the tree, information about Business Copy pairs or XP Snapshot pairs will be displayed in the volume list on the right of the window. Note that no volume will be displayed when you select Subsystem, which is shown in the top of the tree. • Volume list (the area in the upper right of the window) Displays all available volumes. For details, see “Volume List” on page 36.
Figure 5 Volume List The volume list displays the following items. • Previous button When the total number of the volumes in the storage system is more than 1,024, the Previous button displays the previous page of the volume list. If the number of the items in the volume list is less than 1,024, this button is grayed out. • Next button When the total number of the volumes in the storage system is more than 1,024, the Next button displays the next page of the volume list.
Note: An LDEV number that ends with a # indicates that the LDEV is an external volume (for • • • • example, 00:00:01#). An LDEV number that ends with the letter X indicates that the LDEV is a virtual volume used by XP Thin Provisioning (for example, 00:00:00X). For details regarding external volumes, see the HP StorageWorks XP24000 External Storage Software User’s Guide. For information about XP Thin Provisioning, see the HP StorageWorks XP24000 Thin Provisioning Software User's Guide.
Table 18 Pop-up Menus of the Volume List of Business Copy’s Pair Operation Window (In Case an XP Snapshot Pair Is Selected) Command Function Detail Opens the Detail dialog box (Figure 20 on page 68). Pairsplit-S Opens the Pairsplit-S dialog box (Figure 19 on page 66). S-VOL Path Opens the S-VOL Path dialog box (Figure 21 on page 69). Information Opens the Information dialog box (see Figure 22 on page 70), which displays the number of pairs or reserved volumes.
• • • • • • CCC: LU number • XX:YY:ZZ: LDKC number:CU number:LDEV number Note: An LDEV number that ends with a # indicates that the LDEV is an external volume (for example, 00:00:01#). An LDEV number that ends with the letter X indicates that the LDEV is a virtual volume used by XP Thin Provisioning (for example, 00:00:00X). For details regarding external volumes, see the HP StorageWorks XP24000 External Storage Software User’s Guide.
Figure 7 History Window The upper area of the History window lists the operation history of Business Copy pairs, and the lower area of the window lists the operation history of XP Snapshot pairs. For details about the operation history of Business Copy pairs, see the HP StorageWorks XP24000 Business Copy Software User’s Guide. The lower area of the History window displays the following items. • The Previous button allows you to return to the previous page of the list.
Table 20 XP Snapshot History Reference Codes and Messages Code Message Description 0x2001 PAIR An XP Snapshot pair was created. 0x2011 PSUS An XP Snapshot pair was split. 0x2021 SMPL An XP Snapshot pair was deleted. 0x2030 COPY(RS-R) START Restoration of an XP Snapshot pair started. 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.
Pools in the storage system are displayed in the tree. The following icons are displayed. • : storage system. • Pool:X : pool in normal status (X indicates pool ID) • Pool:X : pool whose usage rate exceeds the threshold (X indicates pool ID) • Pool:X : blocked pool (X indicates pool ID) • Pool/volume list (the area in the upper right of the window) If you select Subsystem in the tree, the pool/volume list displays the list of the pools in the storage system.
Note: If there is no error, --- will be displayed. • Preview X(Y): total number of the operations displayed in the Preview list (X) and the type of operation (Y) • Pop-up menu (Preview list in the XP Snapshot window) If you select and right-click the operations in the Preview list, the following pop-up menu will be displayed.
Figure 9 Pool Window The Pool window displays the following items. • Pool Mng. Capacity The name of the program product that uses pool management capacity is displayed. • used This indicates the capacity (GB) of the pool management blocks in use. • total This indicates the total capacity (GB) of the pool management blocks, including the capacity of the pool management blocks in use. Caution: The value displayed for Total Capacity in the Pool Information box and the value displayed for Pool Mng.
Table 22 Pop-up Menus of the Pool Tree Menu When you right-click the XP Snapshot icon: When you right-click the pool icon: Function New Pool Opens the New Pool dialog box (Figure 13 on page 55). You can select this pop-up menu command only when you right-click the XP Snapshot icon. Delete Pool(s) Deletes multiple pools at a time. You can select this pop-up menu command only when the pools that can be deleted exist. Restore Pool(s) Recovers multiple blocked pools to the normal status at a time.
• • • • If you select a CU number from the drop-down list, the volumes in the CU will be displayed in the Free LDEVs list. Note that if you select an LDKC from the LDKC drop-down list, only the CUs in the selected LDKC are displayed. Free LDEVs list Among the volumes in the CU which is selected from the CU drop-down list, the volumes that can be specified as pool-VOLs will be displayed. The following items are displayed in the list.
Completes the SIMs related to pools. If you select the check box and click Apply, the SIMs that occur when the usage rate of a pool exceeds the threshold, or when a pool becomes blocked, will be completed. For details about SIM completion, see “Procedure to Complete the Pool Related SIMs” on page 76. • Apply button Applies the operations that have been performed in the Pool window to the storage system.
• : The storage system or a program product • : V-VOL group • : V-VOL group (in the process of being deleted) • : VDEV • Pop-up menu When you select the icons in the V-VOL group tree and right-click them, the pop-up menus in Table 23 on page 49 will be displayed. Table 23 Pop-up Menus of the V-VOL Group Tree Command Function New V-VOL Group Opens the New V-VOL Group dialog box (Figure 15 on page 60). You can select this command only when you right-click the icon of the program product.
Using the XP Snapshot GUI
5 Performing XP Snapshot Operations This chapter describes the XP Snapshot operations and dialog boxes. Note: When you want to check the result or progress of the operations, or when you want to display the latest information on the windows, click File and then Refresh on the menu bar of the Remote Web Console main window. XP Snapshot Processes Figure 11 on page 51 shows the procedure for using XP Snapshot processes.
• 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. For details on installing additional shared memory, call HP technical support.
• The filter settings are only effective within the current operations in 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. If you select the check boxes in the Display Filter dialog box, only the volumes that meet the condition(s) are allowed to be displayed in the volume list.
1. Select and right-click the setting which you want to delete. A pop-up menu will be displayed. 2. Select the Delete command from the pop-up menu. Only the selected setting will be deleted from the Preview list. Creating or Deleting Pools This section describes how to create new pools. In addition, the procedures for changing the setting of pools or deleting pools are also described in this section.
• The capacity of the pool management blocks in use will increase if you add the pool-VOLs. You need to be careful to keep the capacity of the pool management blocks in use to less than its total capacity. 12. To create another pool, repeat step 2 and the subsequent steps. 13. Click Apply. The confirmation message is displayed asking if it is OK to apply the setting to the storage system. Caution: You cannot delete the pool--VOLs after you add them.
2. Select and right-click the pool whose setting you want to change in the Pool tree of the Pool window. A pop-up menu is displayed. Note: If the pool usage rate is 95% or higher, the pop-up menu will not be displayed. 3. Select the Change Pool Information command from the pop-up menu. The Change Pool Information dialog box (Figure 14 on page 56) is displayed. 4. Select the value for the threshold from the Threshold drop-down list.
A confirmation message is displayed asking if it is OK to apply the setting to the storage system. 6. Click OK. The confirmation message closes and the deletion of the pool is applied to the subsystem. Deleting Multiple Pools To delete 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 section “Deleting a Pool” on page 56. 1. 2. 3.
Initializing the Pool Management Block If you initialize the pool management block, I/O performance of the pool will improve compared to before initialization. You can initialize the pool management block without changing the pools already created in the storage system. The procedure for initializing the pool management block is the same as the proce dure for initializing the V-VOL management area.
12. 13. 14. 15. 16. • The V-VOLs you are creating will be used when you specify the S-VOLs of the XP Snapshot pairs. Since the capacity of the P-VOL and the S-VOL of the XP Snapshot pair must be equal, consider the capacity of the P-VOLs when you decide the V-VOL capacity. Enter the number of the V-VOLs you want to create in the Number of V-VOL text box. Note: You can enter only a whole number from 1 to 1024 in this text box. Click Set.
Figure 15 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. Note: 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 the Next button, an error message will be displayed.
Figure 16 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.
• 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. • Next button Confirms the setting in this dialog box and moves to the Create V-VOL wizard dialog box (2). • Cancel button Cancels the setting in the Create V-VOL wizard dialog box (1) and closes the dialog box. Figure 17 Create V-VOL Wizard Dialog Box (2) The Create V-VOL wizard dialog box (2) displays the following items.
• • • • • • Even when you use the multiple CUs, LDEV numbers will be assigned according to the setting in the Interval drop-down list. Select LDEV No. area Among the CUs which belong to the LDKC you selected from the Select LDKC No. drop-down list, the settings of LDEV numbers for the CU number selected from the Select CU No. drop-down list are displayed. Numbers in the upper end and the left side indicate the LDEV number.
Information about the V-VOL(s) whose V-VOL number you selected from the V-VOL Group drop-down list is displayed. • VDEV: V-VOL group number and VDEV number • Emulation: emulation type of the V-VOL • Capacity: capacity of the V-VOL • LDKC:CU:LDEV: LDKC number, CU number, and LDEV number of the V-VOL • Back button Returns to the Create V-VOL wizard dialog box (2) while maintaining the settings in this dialog box.
You can store one snapshot data at a time by using the pairsplit command, but you cannot specify the snapshot data ID. For details about the pairsplit command, see the HP StorageWorks XP RAID Manager User’s Guide. Note: XP Snapshot does not support Quick Split mode. If you specify Quick Split mode, snapshot data will not be stored in the pool, even if the command ends normally. Restoring XP Snapshot Pairs Use the pairresync -restore command of the RAID Manager to restore XP Snapshot pairs.
The list of the pairs or volumes is displayed in the volume list. 4. Select and right-click the XP Snapshot pairs you want to delete. A pop-up menu is displayed. Note: You cannot delete a Business Copy pair and an XP Snapshot pair at the same time. 5. Select the Pairsplit-S command from the pop-up menu. The Pairsplit-S dialog box (Figure 19 on page 66) is displayed. 6. Click OK.
• BB: The group number of host group • CCC: LU number • XX:YY:ZZ: LDKC number:CU number:LDEV number Note: An LDEV number that ends with a # indicates that the LDEV is an external volume (for example, 00:00:01#). An LDEV number that ends with the letter X indicates that the LDEV is a virtual volume used by XP Thin Provisioning (for example, 00:00:00X). For details regarding external volumes, see the HP StorageWorks XP24000 External Storage Software User’s Guide.
Note: If you select the Detail command in the pop-up menu when you are selecting a Business Copy pair, the displayed Detail dialog box will be different from that displayed when you select an XP Snapshot pair. For details, see the HP StorageWorks XP24000 Business Copy Software User’s Guide. Figure 20 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 is displayed.
• Refresh button Updates the information in the Detail dialog box. • Close button Closes the Detail dialog box. Viewing S-VOL Path Information To display the S-VOL Path dialog box: 1. Display Business Copy’s Pair Operation window. 2. Select and right-click an XP Snapshot pair on the volume list. A pop-up menu is displayed. 3. Select the S-VOL Path command from the menu. The S-VOL Path dialog box is displayed. Figure 21 S-VOL Path Dialog Box The S-VOL Path dialog box displays the following items.
For information about XP Thin Provisioning, see the HP StorageWorks XP24000 Thin Provisioning Software User’s Guide. • The S-VOL Path Information box displays all the path information, including the alternate paths for the S-VOLs selected in the Pair Information box. • Port: The port ID • GID: The group number of the host group • LUN: LU number • Close button Closes the S-VOL Path dialog box.
• Used volume (TB) License information for Business Copy will be indicated in the format X(Y). X indicates license capacity used by Business Copy, and Y indicates total license capacity reserved for Business Copy. Unlimited will be displayed when there is no limited license capacity for Business Copy. • Close button Closes the Information dialog box. Displaying the Operation History The History window (Figure 7 on page 41) displays the history of Business Copy operations. To see the history: 1.
Performing XP Snapshot Operations
6 Troubleshooting If you have a problem with the Remote Web Console, see the HP StorageWorks XP24000 Remote Web Console User’s Guide for troubleshooting information. If an XP Snapshot error code or message is displayed on the Remote Web Console, see “General Troubleshooting” on page 73 for a description of the Business Copy error codes and recommended corrective action. General Troubleshooting Table 24 on page 73 shows problems that are likely to occur when you are using XP Snapshot.
Problems Causes and Solutions Pool usage rate exceeds the threshold. Causes: • Too much snapshot data is stored in the pool. • Capacity of the pool is insufficient. • Threshold of the pool is too low. Solutions: • Delete the snapshot data which is less important or delete the old snapshot data to decrease the usage rate of the pool. See “Deleting XP Snapshot Pairs” on page 65. • Add some pool volumes to increase the capacity of the pool. See “Creating New Pools” on page 54.
Problems Causes and Solutions An error occurred while restoring the pair. Causes: • A volume is blocked because a failure occurred in the hard disk drive. Solutions: • Delete the XP Snapshot pair that is blocked, and call HP technical support. For details about deleting pairs, see “Deleting XP Snapshot Pairs” on page 65. 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.
A pop-up menu is displayed. 3. Select the Restore Pool command from the pop-up menu. A confirmation message is displayed asking if it is OK to restore the selected pool. 4. Click OK. The icon of the selected pool changes to the icon which indicates the normal status. 5. Click Apply. A confirmation message is displayed asking if it is OK to apply the setting to the storage system. 6. Click OK. The confirmation message closes and the restoration of the pool is applied to the subsystem.
Note: If you complete a SIM, the status of the SIM changes to completed. After the problem that caused the SIM is solved, complete the SIM and change its status to completed. 1. 2. 3. 4. 5. 6. Change the status of the pool whose usage rate exceeds the threshold to normal, and restore the blocked pool to change its status to normal. For information about the solutions when the pool usage rate exceeds the threshold and the pool becomes blocked, see Table 24 on page 73.
Troubleshooting
A Acronyms and Abbreviations Table 25 Acronyms and Abbreviations CCI RAID Manager DKA disk adapter DKC disk controller DKCMAIN Disk Controller Main G-ID host group ID LDEV logical device LDKC logical DKC LU logical unit LUN logical unit number PC personal computer PDEV physical device P-VOL primary volume RAID redundant array of independent disks SIM service Information message SMPL simplex S-VOL secondary volume SVP service processor V-VOL virtual volume XP24000 Snapshot
Acronyms and Abbreviations
Index A access attribute, 19 audience, 7 Auto LUN, 19 B Business Copy, 19 C Change Pool Information dialog box, 56 command device, 27 component, 11 Continuous Access, 21 Continuous Access Journal, 21 conventions document, 7 storage capacity values, 7 COPY, 15 Copy Threshold option, 17 COPY(RS), 16 Create V-VOL Wizard dialog box (1), 61 Create V-VOL Wizard dialog box (2), 62 Create V-VOL Wizard dialog box (3), 63 D Data Retention Utility, 19 Detail dialog box, 68 Display Filter dialog box, 52 document
V V-VOL window, 48 volume list, 36 W websites HP, 8 HP Subscriber's Choice for Business, 8 product manuals, 7 82 X XP Snapshot window, 42 XP Thin Provisioning, 23
