HP StorageWorks XP24000 Business Copy Software User's Guide Part number: T5213–96001 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Volume Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Business Copy Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . License Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Requirements for RAID Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Assessing Requirements . . . . . . . . . . . . . . . . . . . . . .
Figures 1 ..Business Copy Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2 ..Cascade Pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ..Change of Pair Status When You Create a Pair . . . . . . . . . . . . . . . . . . . 16 17 4 ..Update Copy Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5 ..Overview of At-Time Split Function . . . . . . . . . . . . . . . . . . . . . . . . 19 6 ..Forward Pairresync Operations . . . . . . . . . . . .
36 ..Detail Dialog Box Displaying Pair Information (L1 and L2 Pairs) . . . . . . . . . . . . 85 37 ..S-VOL Path Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 38 ..Information Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 39 ..Error Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables 1 ..Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2 ..Business Copy Pair Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3 ..Types of Business Copy Options . . . . . . . . . . . . . . . . . . . . . . . . . 27 4 ..Access Attribute and Availability as a Volume of Business Copy Pair . . . . . . . . . . 30 5 ..Availability of Business Copy Operations to the Volume with S-VOL Disable Attribute . . . 30 6 ..
About this Guide This user's guide describes and provides instructions for performing Business Copy operations on the HP storage system using the Business Copy feature option. The term storage system in this guide refers to an HP StorageWorks XP24000 Disk Array.
HP XP storage systems use the following values to calculate logical storage capacity values (logical devices): • • • • • 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.
1 Overview of HP StorageWorks XP Business Copy Software Business Copy The Business Copy feature enables you to maintain storage system-internal copies of all user data on the HP storage system for purposes such as data backup or duplication. The RAID-protected duplicate volumes are created within the same storage system as the primary volume (P-VOL). Business Copy is used for UNIX-based and PC server data. Business Copy can provide up to nine secondary volumes (S-VOLs) or duplicates of one primary volume.
HP StorageWorks XP Snapshot XP Snapshot is a program product similar to Business Copy. It enables you to maintain and copy all data on the storage system. XP Snapshot is used for data for open systems such as UNIX and PC servers. A pair created by XP Snapshot is called an XP Snapshot pair in this document. Note that the use of XP Snapshot involves Business Copy. XP Snapshot and Business Copy are similar because both program products create pairs.
2 About Business Copy Operations Business Copy is a storage-based hardware solution for duplicating logical volumes that reduces backup time and provides point-in-time backup. The Business Copy primary volumes (P-VOLs) contain the original data; the Business Copy secondary volumes (S-VOLs) contain the duplicate data. The user can choose to make up to nine copies of each P-VOL using the Business Copy cascade function.
Figure 1 Business Copy Components You operate Business Copy from the Remote Web Console computer, and copy volumes in the storage system. A volume that has original data is called a P-VOL, and a volume to which the data is copied is called an S-VOL. A pair of the P-VOL and the S-VOL made by Business Copy is called a Business Copy pair. Note that you may operate Business Copy directly from the host if you use RAID Manager. For details, see “RAID Manager” on page 15.
Using RAID Manager, you can define multiple Business Copy pairs as one consistency group. If you have defined a consistency group, you can split all Business Copy pairs in the group by using the At-Time Split function. For details about the At-Time Split function, see “Split Pair Operation” on page 18. Business Copy Software You can operate Business Copy by using the Remote Web Console computer. Remote Web Console is attached to the storage systems via the TCP/IP local-area network (LAN).
P-VOL S-VOL MU#=0 1 S-VOL MU#=1 4 S-VOL MU#=2 5 S-VOL MU#=1 2 S-VOL MU#=1 6 S-VOL MU#=2 7 S-VOL MU#=2 3 S-VOL MU#=1 8 S-VOL MU#=2 9 Legend : Root Volume : Node Volume : Leaf Volume : L1 pair : L2 pair Figure 2 Cascade Pairs The first cascade layer (L1) is the original Business Copy pair. In case of cascaded pairs, the P-VOL of the L1 pair is called root volume, and the S-VOL is called node volume.
SMPL I/O operation P-VOL S-VOL Host COPY(PD) P-VOL S-VOL Initial Copy PAIR P-VOL S-VOL Legend : SMPL status : COPY(PD) status : PAIR status : Time flow Figure 3 Change of Pair Status When You Create a Pair Before the initial copy operation, the status of a pair is SMPL. The status of the pair is COPY(PD) (PD = pending) while the initial copy operation is in progress. The status changes to PAIR when the initial copy is complete.
Differential Data I/O operation P-VOL S-VOL Host Update Copy P-VOL PAIR S-VOL Legend : PAIR status : Time flow Figure 4 Update Copy Operation Caution: Even if the copy operation is completed without any host I/O, the data in the P-VOL and the data in the S-VOL may not be the same. Whether the P-VOL and the S-VOL have the same data depends on the condition of the storage system. To make the P-VOL data and the S-VOL data equal, split the pair and make the pair status PSUS.
When you specify Quick Split, the pair status changes to PSUS(SP), and the S-VOL is available immediately for read and write I/Os (even though it is still reserved). The whole P-VOL data or differential data at that time will be copied to the S-VOL in the background. • Pairsplit by Steady Split When you specify Steady Split, the pair status changes to COPY(SP), and the whole P-VOL data or differential data at that time will be copied to the S-VOL.
data. Performing pairresync on a suspended pair is similar to making an initial copy and is not as fast as performing pairresync on a split pair. The storage system will automatically suspend a Business Copy pair when it cannot keep the pair mirrored for any reason. When the storage system suspends a pair, sense information is generated to notify the host.
Legend : Time flow : Data Host Access permitted Access inhibited COPY(RS) Write Data P-VOL S-VOL Host Access permitted Access inhibited PAIR Resynchronized P-VOL S-VOL Figure 6 Forward Pairresync Operations Caution: Even if the copy operation is completed without any host I/O, the data in the P-VOL and the data in the S-VOL may not be the same. Whether the P-VOL and the S-VOL have the same data depends on the condition of the storage system.
during a reverse copy operation is COPY(RS-R), and the P-VOL and S-VOL become inaccessible to all hosts for write operations during a reverse pairresync operation. As soon as the reverse pairresync is complete, the P-VOL becomes accessible. Note: The P-VOL remains read-enabled during the reverse pairresync operation only to enable the volume to be recognized by the host. The data on the P-VOL is not guaranteed until the reverse pairresync operation is complete and the status changes to PAIR.
Legend : Time flow : Data Host Access inhibited Access inhibited COPY(RS-R) Write Data P-VOL S-VOL Host Access permitted Access inhibited PAIR Resynchronized P-VOL S-VOL Figure 7 Backward Pairresync Operations Notes: • The P-VOL remains read-enabled during the quick restore operation only to enable the volume to be recognized by the host. The data on the P-VOL is not guaranteed until the quick restore operation is complete and the status changes to PAIR.
Pairresync operation time depends on the pair status, PSUS or PSUE. The relationship between the pair status and the time required for pairresync operations are as follows: • Pairresync for PSUS pair When a normal/quick pairresync operation is performed on a split pair (status = PSUS), the storage system copies all differential tracks from the P-VOL to the S-VOL.
1. SMPL Legend: : Change of status Reserved Volume : PAIR status : PSUS status : PSUE status Paircreate 2. P-VOL 3. PAIR P-VOL S-VOL Initial Copy (COPY(PD)) 4. PSUE S-VOL P-VOL 副VOL Pairsplit After the initial copy completed, P-VOL and S-VOL synchronize by update copy. 4. PSUS P-VOL 5. PAIR P-VOL Pairsplit (COPY(SP) or PSUS(SP)) S-VOL Pairresync (COPY(RS) or COPY(RS-R)) S-VOL After the pair resynchronize operation completed, P-VOL and S-VOL synchronize by update copy.
• When you specify Reverse Copy or Quick Restore mode for a pairresync operation, the pair status changes to COPY(RS-R). • When you delete a pair (pairsplit-S), the status of the volumes that were used by the pair changes to SMPL. Note that you cannot delete the pair that has status PSUS(SP). Table 2 on page 26 lists and describes the Business Copy pair status conditions. Table 2 Business Copy Pair Status Pair Status Description S-VOL Access SMPL The volume is not assigned to a Business Copy pair.
Table 3 Types of Business Copy Options Option Type Features Requirement Swap&Freeze Swap&Freeze option suppresses the update copy. For details, see “Swap&Freeze Option” on page 27. You must change the storage system setting to allow the quick restore operation. Host I/O Performance Host I/O Performance option suppresses the copy operations by Business Copy. For details, see “Host I/O Performance Option” on page 28.
Legend PSUS : Time flow : User Data P-VOL S-VOL Quick Restore Operation PAIR P-VOL With Swap&Freeze Option S-VOL Without Swap&Freeze Option PAIR P-VOL PAIR S-VOL P-VOL S-VOL Figure 9 Quick Restore Operation With or Without Swap&Freeze Option The Quick Restore pairresync operation on a pair with status PSUS exchanges the data in the P-VOL and the S-VOL of the pair.
Copy Threshold Option If the load of storage system increases, host server I/O performance (response) may be degraded. If Business Copy performs copy operations when the load of the storage system is heavy, it is more likely that host server I/O performance (response) may be degraded. The Copy Threshold option temporarily stops Business Copy copy operations when the load of the storage system is heavy. If you set this option in effect, you can minimize the degradation of host I/O performance.
Cache Residency Manager Volumes that have Cache Residency Manager settings can be assigned to Business Copy pairs, and Cache Residency Manager operations can be performed on Business Copy P-VOLs and S-VOLs. Caution: See “Performance Considerations” on page 45 for important information on performing quick restore operations on volumes that have Cache Residency Manager settings. LUN Manager LUN Security operations do not affect Business Copy operations.
Auto LUN The following Business Copy volumes can be assigned to migration volumes of Auto LUN: • • • • root volumes that are paired with two or fewer node volumes node volumes that are paired with one leaf volumes node volumes that are not paired with any leaf volumes reserved volumes If you want to: • assign the Business Copy volumes to migration volumes, or • reserve the Business Copy volumes as the migration volumes, or • assign the Business Copy volumes that do not meet the above mentioned conditions,
Figure 10 Shared Volume of Business Copy and Continuous Access: P-VOL The configuration shown in Figure 11 on page 32 is an example of a volume that is functioning as both a Continuous Access S-VOL and a Business Copy P-VOL. This configuration allows you to use Business Copy to provide remote copies of Continuous Access S-VOLs.
• On-site backup copies of Continuous Access P-VOLs and S-VOLs • Remote backup of Business Copy P-VOLs Figure 12 Shared Volumes of Business Copy and Continuous Access: P-VOL/P-VOL and P-VOL/S-VOL The configuration shown in Figure 13 on page 33 is an example of a volume functioning as both a Business Copy S-VOL and a Continuous Access P-VOL. This configuration allows you to use Continuous Access to provide asynchronous remote copy.
Continuous Access Journal Continuous Access Journal volumes can be assigned to Business Copy pairs, and Business Copy volumes can be assigned to Continuous Access Journal pairs. Business Copy and Continuous Access Journal can function together in the same storage system to provide both internal and remote backup for your important data. Notes: • A primary volume (P-VOL) of Continuous Access Journal means a primary data volume of Continuous Access Journal.
Figure 15 Shared Volume of Business Copy and Continuous Access Journal: P-VOL/S-VOL Caution: When you use a Business Copy P-VOL as a Continuous Access Journal S-VOL as shown in Figure 15 on page 35, the write operation to the Continuous Access Journal P-VOL may takes extra time due to the time necessary for the copying process of the Business Copy pair.
Figure 16 Shared Volumes of Business Copy and Continuous Access Journal: P-VOL/P-VOL and P-VOL/S-VOL The configuration shown in Figure 17 on page 36 is an example of a volume that is functioning as both a Business Copy S-VOL and a Continuous Access Journal P-VOL. This configuration allows you to use Continuous Access Journal to provide remote copies of Business Copy S-VOLs.
Note: A primary volume (P-VOL) of Continuous Access Journal means a primary data volume of Continuous Access Journal. A secondary volume (S-VOL) of Continuous Access Journal means a secondary data volume of Continuous Access Journal.
Table 6 Combination of the Volumes when you Specify XP Thin Provisioning Volume as a P-VOL or an S-VOL P-VOL S-VOL Combination XP Thin Provisioning volume XP Thin Provisioning volume OK*1 XP Thin Provisioning volume Normal volume OK*1 Normal volume XP Thin Provisioning volume No*2 Note*1: You cannot perform quick pairresync operation on the pair of this volume combination.
3 Preparing for Business Copy Operations This chapter describes the requirements and preparations you should know before attempting Business Copy operations. System Requirements Business Copy operations involve the storage system containing the primary and secondary volumes and the licensed Business Copy program product enabled on the Remote Web Console. The system requirements for Business Copy are as follows.
In case of an L1 pair, you can use 0, 1 or 2 as an MU number. In case of an L2 pair, you can use 1 or 2 as an MU number. • Number of S-VOLs per one P-VOL You can assign up to three S-VOLs to one P-VOL when creating an L1 pair. When creating an L2 pair (leaf pair), you can assign up to two S-VOLs to one P-VOL. However, you cannot assign two or more P-VOLs to one S-VOL. • Maximum number of pairs Up to 16,384 Business Copy pairs can be created (when P-VOLs and S-VOLs are in a one-to-one relationship).
Reserved Not reserved Figure 20 Total Capacity of Business Copy Volumes (Example 1) Figure 21 on page 41 shows an example of one Business Copy pair. In this case, the total capacity of Business Copy volumes in use will be 2. L1 pair P-VOL S-VOL Reserved Figure 21 Total Capacity of Business Copy Volumes (Example 2) Figure 22 on page 41 shows an example of Business Copy pairs (L1 pairs and L2 pairs). In this case, the total capacity of Business Copy volumes in use will be 5.
Calculating Maximum Number of Pairs When you create Business Copy pairs, resources called differential tables and pair tables will be required. The number of available differential tables and pair tables in one storage system depends on whether additional shared memory is installed or not. Table 8 on page 42 shows the differential and pair tables that are supported by the options for adding shared memory.
and see the HP StorageWorks XP24000 Snapshot User’s Guide to calculate the number of differential tables and pair tables that are required for XP Snapshot. Assuming that only Business Copy uses differential tables and pair tables, this section describes how to calculate the number of differential tables and pair tables required for one Business Copy pair, and the conditions you need to consider when calculating the number of Business Copy pairs that can be created.
* If the volume is divided by VLL function, you need to apply the capacity of the volume after the division. You cannot perform VLL operations on an OPEN-L volume. Therefore, if the emulation type is OPEN-L, the value substitute for (X) is the default capacity of the volume. The following table shows the number of the control cylinders according to the emulation types.
3 x 10 + 577 x 20 = 11,570 ≤ 26,167 and also 1 x 10 + 17 x 20 = 350 ≤ 8,192 Therefore, you can see that 10 pairs of OPEN-3 volumes and 20 pairs of OPEN-L volumes can be created. Conditions for the Number of Business Copy Pairs that can be Created (LUSE Volume Exists) The number of Business Copy pairs that can be created will change according to whether LUSE volumes are used or not. This section describes how to calculate the number of Business Copy pairs that can be created when LUSE volumes are used.
• • • • 46 For example, assigning three S-VOLs to each P-VOL takes more resources than assigning only one or two. The more S-VOLs you assign to a given P-VOL, the larger the attenuating effect on the potential P-VOL I/O performance. Note that when you assign only one S-VOL on a P-VOL, the pace of the initial copy operations may affect the I/O performance of the storage system.
• Release the Cache Residency Manager settings of the P-VOL and S-VOL before the quick restore operation, and then reset the Cache Residency Manager settings of the P-VOL and S-VOL after the pair changes to PAIR status as a result of the quick restore operation. If you do not perform one of the above mentioned operations, the change of location of the cache residence areas may cause I/O performance to the Cache Residency Manager data to be severely attenuated.
The maintenance of a PDEV that is not used by Business Copy does not affect the Business Copy operations and the status of Business Copy pairs. Even if a PDEV contains LDEVs used by Business Copy, you can maintain that PDEV independently of the Business Copy operations or Business Copy pair status. However, if a PDEV failure occurs, though Business Copy pair status is kept the same as before failure, there will be affections such as degradation of copy pace.
To install Business Copy: 1. Log on to the SVP and start up the Java application of the Remote Web Console. For information about how to log on to the SVP, see the HP StorageWorks XP24000 Remote Web Console User’s Guide. 2. Install Business Copy on the Remote Web Console computer. You need to install Business Copy in every storage system on which you want to use Business Copy. For information about how to install Business Copy, see the HP StorageWorks XP24000 Remote Web Console User’s Guide.
Preparing for Business Copy Operations
4 Using the Business Copy GUI Business Copy has four windows that can be displayed by clicking tabs: Pair Operation tab, History tab, Option tab, and XP Snapshot tab. However, you do not need the XP Snapshot window, which will be displayed when you click the XP Snapshot tab, for Business Copy operations. For detailed information about the XP Snapshot window, see the HP StorageWorks XP24000 Snapshot User’s Guide. This chapter describes the items displayed in three windows other than the XP Snapshot window.
right side of the Pair Operation window by selecting a port or a host group. Note that no volume will be displayed when you select Subsystem on the top of the Tree. • The volume list, which is on the upper right of the Pair Operation window, displays all available volumes. For details, see “Volume List” on page 52.
Figure 24 The Volume List Displaying Volumes (L1 pairs) The Volume List lists all the installed volumes (LUs) on the selected port and displays the following information for each volume: • Message: A message will be displayed when there is no volume or pair to be displayed. If you see the message in the Volume List, click a different icon in the Tree on the left area of the Pair Operation window. • P-VOL: Information about P-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
• Hide Mode: When the S-VOL cannot be read in the mode, N is displayed. Table 12 on page 54 shows the S-VOL status, which is indicated by the displayed letters. Table 12 S-VOL Status Indicated by the SvolMode S-VOL Write (W) Hide Mode (N) Letters OFF OFF — OFF ON N ON OFF W ON ON W • Copy Pace: The copy pace (Slower, Medium, or Faster) for the pair being created is displayed.
Table 14 Business Copy Pop-up Menu Commands of the Pair Operation Window Command Feature Detail Opens the Detail dialog box that displays detailed information for the selected volume or pair (see Figure 36 on page 85). Paircreate Opens the Paircreate dialog box, which allows you to create new Business Copy pairs (see Figure 31 on page 66). Pairsplit Opens the Pairsplit dialog box, which allows you to split Business Copy pairs (see Figure 32 on page 72).
• MU: The MU number of the Business Copy pair created with the P-VOL. For details about what will be displayed in this item if you select XP Snapshot pairs, see the HP StorageWorks XP24000 Snapshot User’s Guide. • S-VOL: Information about S-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
Figure 26 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 XP Snapshot pairs, see the HP StorageWorks XP24000 Snapshot User’s Guide. The upper area of the History window displays the following items. • The Previous button allows you to return to the previous page of the list.
Table 16 Business Copy Status & History Reference Codes and Messages Code Message Description 4710 - 471F PAIR START The Business Copy initial copy operation started. 4720 - 472F PAIR END The Business Copy initial copy operation ended, and the pair status changed to PAIR. 4730 - 473F PSUS START The Business Copy pairsplit operation started, and the pair status changed to COPY(SP) or PSUS(SP). 4740 - 474F PSUS END The Business Copy pairsplit operation ended, and the pair status changed to PSUS.
Figure 27 Option Window The Option window displays the following information: • Select Option(s) box: When you check the check box of the option name, that option will be enabled. If you unselect the check box, that option will be disabled. Note that the only options that are available in this box are Swap & Freeze and HOST I/O Performance. Even if you have selected the check boxes of other option names, they will not be enabled.
Using the Business Copy GUI
5 Performing Business Copy Operations This chapter describes Business Copy operations using Remote Web Console. 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.
• • • • • displayed. Note: If you select the Reserved check box, you cannot select any other check boxes. Note: Volumes specified as the S-VOL of a Business Copy pair are automatically reserved by the storage system. • The Pair check box allows you to display paired volumes. • The Non-Pair check box allows you to display non-paired volumes. • The Cascade check box allows you to filter the pairs in the Volume List by cascade level.
3. Select the Modify command from the pop-up menu. The dialog box that enables you to change the selected setting will be displayed. 4. Change the setting and click OK. The dialog box will close and the change of the setting will be reflected in the Preview list. Deleting the Settings in Preview List To delete all of the settings in the Preview list, click the Cancel button. To delete only some of the settings in the Preview list: 1. Select and right-click the setting that you want to delete.
• • • • • Guide. For information about XP Thin Provisioning, see the HP StorageWorks XP24000 Thin Provisioning Software User's Guide. Emulation: The emulation type of the volume. Capacity (MB): The storage capacity of the volume displayed in megabytes (MB). CLPR: The cache logical partition of the volume is displayed. The OK button allows you to reserve an SMPL volume as the Business Copy S-VOL by setting its reserve attribute.
• Volume: Information for the volume is displayed in AAA-BB-CCC(XX:YY:ZZ) format. • AAA: The port ID (cluster and channel number) • 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 # mark indicates that the volume is an external volume (for example, 00:00:01#). An LDEV number that ends with a letter X indicates that the LDEV is a virtual volume used by XP Thin Provisioning (for example, 00:00:01X).
• If you do not want to set any option, clear all check boxes in the Select Option(s) box. 3. Click Apply. You can now perform a Business Copy operation with the specified option. Creating Pairs WARNING: The Business Copy paircreate operation overwrites all existing data on the S-VOLs. The user is responsible for backing up the data on the S-VOLs before creating Business Copy pairs.
the 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. • MU: The MU number of the P-VOL. • Status: The status of the P-VOL. • S-VOL: Information about S-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
• • • • • • • • Note: The number of secondary volumes that can be displayed in the S-VOL List at a time is limited to 1,024 volumes. In case the number of volumes defined in the storage system exceeds this limit, use the Previous and Next buttons on the upper right of the S-VOL List to turn the pages of the S-VOL List and see the entire list. The Previous button allows you to return to the previous page of the S-VOL List.
Note: To remove any volumes from the list, select the volumes, right-click the mouse to display the pop-up menu, and then select the Delete command. 6. Select the S-VOLs for each P-VOL as follows: a. Select the desired P-VOL on the Paircreate Volume List. b. Select the MU number (0, 1, or 2) for the L1 pair being created from the Select MU drop-down list. c. Select the desired port from the Port drop-down list in the Select S-VOL box.
2. Go to the Pair Operation window, and select the desired L1 pairs to which you want to add the L2 pairs, right-click the selected L1 pairs to display the pop-up menu, and then select the Paircreate command to open the Paircreate dialog box. 3. On the Paircreate dialog box, select the desired L1 pair from the Paircreate Volume List. 4. Select the MU number (1 or 2) from the Select MU drop-down list. 5. Select the desired S-VOL for the new L2 pair. 6.
Table 19 Relationship between L2 Pair Status and L1 Pair Operations L2 Pair Status L1 Pair Operations Paircreate Pairsplit Pairresync Pairsplit-E Pairsplit-S COPY(PD) OK*1*2 OK OK OK OK PAIR OK*1*2 OK OK OK OK *2 NO (CMD RJT) OK OK COPY(SP) NO (CMD RJT) PSUS(SP) NO (CMD RJT) *2 NO (CMD RJT) *2 NO (CMD RJT) OK OK PSUS OK*1*2 OK OK OK OK COPY(RS) OK*1*2 OK OK OK OK NO (CMD RJT) — — — OK OK OK OK COPY(RS-R) NO (CMD RJT) PSUE OK*1*2 *2 *2 NO (CMD RJT) *1
addition, you can split multiple pairs at the same specified time by using RAID Manager. For details, see “Performing At-Time Split Operation (Multiple Pair Splitting)” on page 77. Figure 32 Pairsplit Dialog Box The Pairsplit dialog box consists of the following components.
a virtual volume used by XP Thin Provisioning (for example, 00:00:01X). For details regarding the 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. • Emulation: The emulation type of the P-VOL and S-VOL. • Capacity(MB): The volume capacity displayed in megabytes (MB). • CLPR(P): The cache logical partition of the P-VOL.
Table 22 Operations from the Host Servers During the Pairsplit Operation Operations Volumes Quick Split P-VOL Both areas that are not copied and areas that are already copied can be read as usual. S-VOL The areas that are already copied can be read as usual. If the host server tries to read the area that is not copied yet, firstly Business Copy copies that area from the P-VOL, and then the host server will read the area after the copy operation completes.
• • • • • • CCC: LU number • XX:YY:ZZ: LDKC number:CU number:LDEV number Note: An LDEV number that ends with a # mark indicates that the LDEV is an external volume (for example, 00:00:01#). An LDEV number that ends with a letter X indicates that the LDEV is a virtual volume used by XP Thin Provisioning (for example, 00:00:01X). For details regarding the external volumes, see the HP StorageWorks XP24000 External Storage Software User’s Guide.
Performing Pair Creation and Pair Splitting The Pairsplit dialog box can also be used to simultaneously create and split new Business Copy pairs. To simultaneously create and split one or more new Business Copy pairs: Caution: The P-VOL and S-VOL are synchronized only when the pair status changes from COPY(SP) or PSUS(SP) to PSUS. Due to the Business Copy asynchronous update copy operations, this status transition can take several minutes.
Note: Use the Change button to replace S-VOLs, the Cascade button to add L2 S-VOLs, and the Delete command selected from the pop-up menu (that will be displayed by right-clicking) to remove pairs. 9. When the Pairsplit dialog box displays the desired L1 and L2 pairs, click OK to reflect the settings in the Pairsplit dialog box to the Preview List on the Pair Operation window. 10. On the Pair Operation window, click Apply to apply the operation settings in the Preview List to the storage system.
• You cannot define the L1 and L2 cascade pairs that share the same node volume in a consistency group. If you specify such pairs in the same consistency group, the paircreate command will be rejected. • Do not mix pairs created with the At-Time Split option and pairs not created with the At-Time Split option in the same group defined in the RAID Manager configuration file.
the 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. • MU: The MU number of the P-VOL. • Status: The status of the P-VOL. • S-VOL: Information about S-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
Figure 34 Pairresync Dialog Box The Pairresync dialog box consists of the following components. • Pairresync Volume List The Volume List located on the upper side of the Pairresync dialog box displays the following information pertaining to the P-VOL and S-VOL of the pair you want to resynchronize: • P-VOL: Information about P-VOL is displayed in AAA-BB-CCC(XX:YY:ZZ) format.
• The Resync Type drop-down list allows you to select the pairresync type for the pairs being resynchronized (from Normal Copy(P->S), Quick Resync(P->S), Reverse Copy(S->P), or Quick Restore(S->P)). Remember that you must select either Normal Copy(P->S) or Quick Resync(P->S) if the selected pair is L2 pair or its status is PSUE.
To resynchronize one or more Business Copy pairs that have been split or suspended: 1. 2. 3. 4. 5. 6. Unmount the split (PSUS) S-VOLs from the host before starting the pairresync operations. When the pairresync operation starts, the storage system will stop accepting write I/Os to the S-VOL. Go to the Pair Operation window, and select the desired port or host group in the Tree to filter the volumes displayed in the Volume List.
Deleting Pairs The Pairsplit-S dialog box (see Figure 35 on page 83) allows you to delete the pairs. Note that the Pairsplit-S is an operation to stop copying data into the S-VOL of a Business Copy pair, and set the status of the P-VOL and S-VOL back to SMPL volumes. Figure 35 Pairsplit-S Dialog Box The Pairsplit-S dialog box consists of the following components.
Guide. For information about XP Thin Provisioning, see the HP StorageWorks XP24000 Thin Provisioning Software User's Guide. • Emulation: The emulation type of the P-VOL and S-VOL. • Capacity(MB): The volume capacity displayed in megabytes (MB). • CLPR(P): The cache logical partition of the P-VOL. • CLPR(S): The cache logical partition of the S-VOL.
Figure 36 Detail Dialog Box Displaying Pair Information (L1 and L2 Pairs) The Detail box in the Detail dialog box has the following features: • P-VOL Information displays the following information: • Volume ID: Information about the P-VOL is displayed in XX:YY:ZZ (LDKC number:CU number:LDEV number) format. Note: An LDEV number that ends with a # mark indicates that the LDEV is an external volume (for example, 00:00:01#).
Note: An LDEV number that ends with a # mark indicates that the LDEV is an external volume (for example, 00:00:01#). An LDEV number that ends with a letter X indicates that the LDEV is a virtual volume used by XP Thin Provisioning (for example, 00:00:01X). For details regarding the 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.
Figure 37 S-VOL Path Dialog Box The S-VOL Path dialog box has the following features: • The Pair Information box displays only information about the paths that are used by the Business Copy pairs selected in the Pair Operation window Volume List. P-VOL displays the path information for the P-VOLs and S-VOL displays the path information for the S-VOLs in AAA-BB-CCC(XX:YY:ZZ) format.
1. Right-click anywhere on the volume list of the Pair Operation window. A pop-up menu will be displayed. 2. Click the Information command in the pop-up menu. The Information dialog box will be displayed. Figure 38 Information Dialog Box The following information will be displayed in the Information dialog box: • Business Copy pairs The number of Business Copy pairs will be displayed in the format of XXXX / YYYY.
To see the history: 1. Display the History window. Notes: • If you are already displaying the other window shown by a tab, click the History tab. For information about how to display the History window directly by starting up Remote Web Console, see “Starting Business Copy” on page 49.
Performing Business Copy 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 a Business Copy error code or message is displayed on the Remote Web Console, see “General Troubleshooting” on page 91 for a description of the Business Copy error codes and recommended corrective action. General Troubleshooting Table 26 on page 91 provides general troubleshooting instructions for Business Copy operations.
To display the Error dialog box, select the failed volume in the Preview List on the Pair Operation window, right-click to display the pop-up menu, and then click Error Detail. See the HP StorageWorks XP Remote Web Console Error Codes for the list of error codes and corrective actions.
A Acronyms and Abbreviations Table 27 Acronyms and Abbreviations ACP array control processor CTG consistency group CU control unit (logical control unit) CVS customized volume size DKC disk controller ECC Error Check and Correct ESCON Enterprise System Connection (IBM trademark for optical channels) G-ID host group ID GT HP Graph-Track LAN local-area network LDEV logical device LDKC logical disk controller LU logical unit LUN logical unit number MU mirror unit PC personal comp
Acronyms and Abbreviations
Index A At-Time Split, 19 audience, 9 Auto LUN, 31 B Business Copy components, 13 deleting pairs (pairsplit-S), 83 initial copy operation, 16 pair status, 24 requirements, 39 sharing volumes with Continuous Access, 31 sharing volumes with Continuous Access Journal, 34 starting operations, 49 suspending pairs (pairsplit-E), 78 system requirements, 39 troubleshooting, 91 update copy operation, 17 C Cache Residency Manager, 30 cascade function, 15 consistency group, 77 Continuous Access sharing volumes wi
O operations, 13 normal resync, 20 paircreate, 15 pairresync, 20 pairsplit-E, 19 pairsplit-S, 24 quick restore pairresync, 22 quick resync, 20 quick split, 18 reserve, 15 reset reserve, 65 reverse pairresync, 21 split, 18 starting, 49 steady split, 18 Option, 26 Option setting, 65 Option window, 58 P PAIR, 26 pair status, 24 COPY(PD), 26 COPY(RS), 26 COPY(RS-R), 26 COPY(SP), 26 PAIR, 26 PSUE, 26 PSUS, 26 PSUS(SP), 26 SMPL, 26 Paircreate, 66 paircreate, 15 Paircreate dialog box, 66 Pairresync, 79 pairresy
