Hitachi ShadowImage for z/OS user guide Part number: HIT9503-96004 Fourth edition: June 2006
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Contents About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Supported storage platforms and firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intended audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The Display Filter Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 The Preset Volume List Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 FlashCopy Information Pane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Performing ShadowImage Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 General ShadowImage Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 ShadowImage Error Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Using Compatible Mirroring for IBM FlashCopy Version2 . . . . . . . . . . . . . . . . . . . . . . . . .
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 6 Quick Restore operation with or without Swap&Freeze option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 At-Time Split function (specifying copy group) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 At-Time Split function (specifying the split time) . . . . . . . . . . . . . . . . . . . . .
63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 Example of DFSMSdss Command (COPYFULL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Copying All Datasets Using DFSMSdss Command (COPYFULL) . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 Example of DFSMSdss Command (COPY DS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 8 Accepting PPRC commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 PSF command operability for ShadowImage volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 PSF and DEVSERV results for ShadowImage volumes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About this guide This guide provides information about: • Preparing for ShadowImage Operations, page 35 • Starting ShadowImage, page 43 • Performing ShadowImage Operations, page 51 • Using PPRC Commands for ShadowImage, page 71 • Using ShadowImage - FlashCopy, page 85 • Troubleshooting, page 94 • Using Compatible Mirroring for IBM FlashCopy Version2, page 95 Supported storage platforms and firmware In this guide, the term array refers to the following storage platforms: • HP StorageWorks XP12000 Disk Array
Document conventions and symbols Table 1 Document conventions Convention Element Medium blue text: Figure 1 Cross-reference links and e-mail addresses Medium blue, underlined text (http://www.hp.
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1 ShadowImage for the XP1024/XP128/XP12000/XP10000 ShadowImage (SI390) is a storage-based hardware solution for duplicating logical volumes that reduces backup time and provides point-in-time backup. The SI390 source volumes (S-VOLs) contain the original data and the SI390 target volume(s) (T-VOLs) contain the duplicate data. The user can choose to make up to three copies of each S-VOL. Because each T-VOL is paired with its S-VOL independently.
data. The SI390 T-VOLs are the target or secondary (mirrored) volumes that contain the backup data. Each T-VOL must be paired with only one S-VOL. During normal SI390 operations, the S-VOLs remain available to all hosts at all times for read and write I/O operations. The T-VOLs become available for host access only after a split operation has been performed. When an SI390 volume pair is added, the data on the S-VOL is copied to the T-VOL.
• Auto LUN XP IBM PPRC Host Software Functions SI390 supports the IBM PPRC host software functions, including TSO PPRC commands and ICKDSF PPRCOPY commands. SI390 pairs can be added, split, resynced, and deleted using TSO PPRC or ICKDSF PPRCOPY commands. ”Using PPRC Commands for ShadowImage” on page 71 describes and provides instructions for using PPRC commands to create and maintain SI390 volume pairs on the XP1024/XP128/XP12000/XP10000.
Table 2 ShadowImage for z/OS requirements (continued) Parameter Specification Cache maintenance If XP1024/XP128/XP12000/XP10000 cache maintenance is performed during a period of high I/O usage, one or more SI390 pairs may be suspended. Reduce the I/O load before cache maintenance. Failures When a failure of any kind prevents an SI390 copy operation from completing, the pair is suspended. If an LDEV failure occurs, the pair is suspended.
Table 3 The Number of the Control Cylinders According to the Emulation Types (continued) Emulation Type Number of the Control Cylinders 3390-9 25 3390-9A 25 3390-9B 25 3390-9C 25 3390-L 23 3390-LA 23 3390-LB 23 3390-LC 23 3390-M 53 3390-MA 53 3390-MB 53 3390-MC 53 NF80-F 22 NF80-K 7 NF80-KA 7 NF80-KB 7 NF80-KC 7 The maximum number of pairs that can be created is the largest number that meets the equation, Σ ( α ) ≤ ( β ), where: Σ ( α ) stands for the total of the numbe
XP1024/XP128/XP12000/XP10000. Use the Set Reserve Attribute window (see ”Setting the Reserve Attribute” on page 51) to reserve volumes for use as T-VOLs. The SI390 reset reserve attribute operation unreserves a volume so that it can be varied online and accessed by hosts. After you reset the reserve attribute, the XP1024/XP128/XP12000/XP10000 will accept all subsequent read and write I/O operations to the volume.
NOTE: When adding pairs, you can select the pace for the initial copy operations: slower, medium, or faster. The slower pace minimizes the impact of SI390 operations on disk array I/O performance while the faster pace completes the initial copy operations as quickly as possible. Figure 2 Adding a pair Update Copy Operation The SI390 update copy operation updates the T-VOL of an SI390 pair after the initial copy operation is complete.
NOTE: Update copy operations do not occur every time a host issues a write I/O operation to the S-VOL of a zSeries and SI390 pair. Update copy operations are performed asynchronously according to the differential bitmap, which is stored in shared memory. If shared memory is lost (for example, offline micro exchange or volatile PS on), the differential bitmap is also lost.
Split Type When splitting pairs, you can also select the split type: Quick Split or Steady Split. • When you specify Quick Split: When the quick split operation starts, the pair status changes to V-split. You have full read/write access to the split T-VOL (even though it is still reserved). The whole S-VOL data or differential data at that time will be copied to the T-VOL in the background.
Resynchronize Pair Operations (Normal, Quick, Reverse, Quick Restore) To change the status of pairs from Split to Duplex or from Suspend to Duplex, you must resynchronize the pairs.
Backward Pairresync Operation Backward pairresync operation resynchronizes pairs by copying data on T-VOLs to S-VOLs. The following are the types of the backward pairresync operations: • Reverse. The reverse resync operation (see Figure 5) synchronizes the S-VOL with the T-VOL. The copy direction for a reverse resync operation is T-VOL to S-VOL. Table 5 on page 24 lists the operational requirements for the reverse resync operation.
If you do not want the S-VOL and T-VOL to be resynchronized after the quick restore operation, you must set the Swap&Freeze option before performing the quick restore operation (see ”Swap&Freeze Option” on page 27 and ”ShadowImage Options” on page 26). Table 5 Reverse and quick restore Pairresync requirements Parameter Requirement(s) Pair status. The specified pair must be in the split state. All other pairs that share the same S-VOL as the specified pair must also be in the split or suspended state.
NOTE: During reverse copy or quick restore operation, you cannot perform add, split, or resync pair for any other pair that shares the same S-VOL (delete pair and suspend pair are allowed). Pair Status and the Time Required for Pairresync The pairresync operation can be performed on a split pair or a suspended pair. This section describes the relationship between pair status and time required for pairresync operations. • Resync for split pair.
and quick restore cannot be performed on suspended pairs. While the resync operation for a split pair can be very fast, the resync operation for a suspended pair will take as long as the initial copy operation. The XP1024/XP128/XP12000/XP10000 will automatically suspend an SI390 pair when it cannot keep the pair mirrored for any reason. When the XP1024/XP128/XP12000/XP10000 suspends a pair, sense information is generated to notify the host.
Table 6 Types of ShadowImage options (continued) Option Type Features FCv2 Slower Copy1 FCv2 Slower Copy2 NOTE: Requirement You need to set FCv2 Slower Copy2 option invalid. FCv2 Slower Copy1 option suppresses the copy operations by FlashCopy Mirror Version 2, and prioritize the host I/O operations. For details, see ”Fcv2 Slower Copy2 Option” on page 28. – Available option types depend on the XP1024/XP128/XP12000/XP10000 settings.
When SI390 copying processing is suppressed by the Host I/O Performance option, the time taken for copying increases. Also, if BC pairs exist, host I/O responses might not be faster. In this case, set the Host I/O Performance option for BC as well. FCv2 Slower Copy1 Option The FCv2 Slower Copy1 option is used to improve host I/O responses over copying processing time of FlashCopy Mirror Version 2 pairs.
For instructions on using Business Continuity Manager, please refer to the Business Continuity Manager™ User and Reference Guide. An SI390 consistency group is a user-defined set of SI390 volume pairs used for the At-Time Split function and have the following restrictions: • You can configure up to 128 consistency groups in a disk array, including the BC consistency groups. • A number (0-127) is assigned to each consistency group. You can specify a consistency group number when you create SI390 pairs.
CAUTION: When you execute the At-Time Split function, mind the following: • Change the status of pairs in the same consistency group according to the copy group. • If you are going to execute the At-Time Split function successively, before you execute the function for the second time, verify that status of all the pairs in the same consistency group is changed to the status which is specified by the YKEWAIT command.
XP1024/XP128/XP12000/XP10000. Figure 9 illustrates the pair status transitions and the relationship between the pair status and the SI390 operations. Figure 9 ShadowImage pair status transitions 1. If a volume is not assigned to a ShadowImage for z/OS (SIz) pair, its status is simplex. 2. Select the simplex volumes for S-VOL and T-VOL to create an SIz pair. When you create an SIz pair, the initial copy operation starts.
NOTE: When you specify reverse or quick restore mode for a pairresync operation, the pair status changes to resync-r (data is copied in the reverse direction from the T-VOL to the S-VOL). For more information about pairresync operation settings, see ”Resynchronizing ShadowImage Pairs” on page 58. When you delete a pair, the pair status changes to simplex. You cannot delete the pair with status V-Split. Table 7 shows the allowable operations for each pair status.
Table 8 ShadowImage for z/OS pair status (continued) Status Description Host Status S-VOL Access T-VOL Access SP-Pend The status becomes SP-Pend when the Steady Split mode is selected for the split operation. All S-VOL updates prior to the split command are being copied to the T-VOL. When these updates are complete, the split T-VOL is identical to the state of the S-VOL when the split started. The XP1024/XP128/XP12000/XP10000 rejects writes for SP-Pend T-VOLs. S-VOL = PPRI-PNDG Read/write.
Cautions on Switching Off the Power Supply If you need to switch off the power supply of the disk array during SI390 operations, make sure to: • Complete copying for the SI390 pair in the SP-pend status first to change the pair status from SP-pend to split, and then switch off the power supply. If the shared memory is volatilized when you switch on the power supply again, the pair in the SP-pend status changes to suspend. • Establish a timetable for SI390 copying operations.
Preparing for ShadowImage Operations System Requirements SI390 operations involve the XP1024/XP128/XP12000/XP10000 containing the S-VOLs and T-VOLs, the SI390 feature enabled on the Command View management station or XP Remote Web Console, and (optional) S/390 host PPRC software functions. The SI390 system requirements are: • XP1024/XP128/XP12000/XP10000. All XP1024/XP128/XP12000/XP10000 hardware, microcode, and software required for SI390 operations must be installed and enabled.
• Virtual LVI/LUN. Virtual LVI/LUN volumes can be assigned to SI390 pairs provided that the T-VOL has the same capacity as the S-VOL. If you need to perform Virtual LVI/LUN operations on an existing SI390 S-VOL or T-VOL, you must delete the pair first to return the volume to simplex status. • Cache LUN XP. Cache LUN XP volumes can be assigned to SI390 pairs, and Cache LUN XP operations can be performed on existing SI390 S-VOLs and T-VOLs.
T-VOL using the T-VOL’s LDEV ID in the host command. The SI390 remote console software displays the LDEV ID and SI390 pair status of all T-VOLs associated with an S-VOL. • Reverse resync and quick restore operations can be performed on shared SI390/TC390 pairs only when the TC390 pair is suspended.
The configuration shown in the following figure is an example of a volume that is functioning as both an SI390 S-VOL and a TC390 R-VOL. With this configuration, you can use SI390 to provide additional remote copies of TC390 M-VOLs. Figure 11 SI390 and TC390: shared S-VOL/R-VOL The configuration shown in the following figure is an example of a volume that is functioning as both a TC390 M-VOL and an SI390 S-VOL, while the R-VOL of the same TC390 pair is also functioning as the S-VOL of another SI390 pair.
NOTE: A primary volume (P-VOL) of Universal Replicator for z/OS® means a primary data volume of Universal Replicator for z/OS®. A secondary volume (S-VOL) of Universal Replicator for z/OS® means a secondary data volume of Universal Replicator for z/OS®. The configuration shown in Figure 3.5 is an example of a volume functioning as both a URz S-VOL and a TCz M-VOL. In this configuration, you cannot use this volume as the S-VOL of a SIz pair.
Combining ShadowImage for z/OS (SIz) with Universal Replicator for z/OS (URz) URz volumes can be assigned to SIz pairs, and SIz volumes can be assigned to URz pairs. NOTE: A Universal Replicator for z/OS primary volume (P-VOL) means a primary data volume of Universal Replicator for z/OS. A Universal Replicator for z/OS secondary volume (S-VOL) means a secondary data volume of Universal Replicator for z/OS. NOTE: SI390 is recommended for intra-disk array copy operations.
• Use URz to provide remote backup copies of ShadowImage for z/OS S-VOLs. Figure 16 SIz and URz: Shared S-VOL/P-VOL The configuration shown in Figure 17 is an example of a volume that is functioning as both an SIz S-VOL and a URz S-VOL. This configuration allows you to use SIz to provide additional remote copies of URz S-VOLs.
• Use URz to provide remote backup of ShadowImage for z/OS S-VOLs. Figure 18 SIz and URz: Shared S-VOL/P-VOL and S-VOL/S-VOL NOTE: Usually TCz and URz can share the volumes with SIz. However, in some cases, you cannot create SIz pairs using the volume shared with TCz and URz. The configuration shown in Figure 3.10 is an example of a volume which is functioning as both a ShadowImage for z/OS® T-VOL and a URz P-VOL.
Figure 20 SIz and URz: Shared T-VOL/P-VOL Note: Usually TCz and URz can share the volumes with SIz. However, in some cases, you cannot create SIz pairs using the volume shared with TCz and URz. For details of the examples about the combination of SIz, TCz, and URz, see Figure 14 and Figure 15. Starting ShadowImage To start SI390: 1. Click the Mainframe tab, and then click the ShadowImage button ( ).
ShadowImage Main Window There are four tabs that you can access in ShadowImage: Main, History, Options, and CTG tabs. NOTE: The CTG tab and its features are available only if the XP disk array has firmware version 21.07.04 or later installed. This section discusses the Main tab. For information about the History tab, see ”Viewing the Past Record of Pair Operations” on page 62; for the Options tab, see ”Setting ShadowImage Options” on page 65; and for the CTG tab, see ”CTG Window” on page 65.
Y = total number of SI390 and SI reserved volumes Z = maximum allowable number of reserved volumes • Pair: X(Y)/Z, where X = total number of SI390 pairs Y = total number of SI390 and SI pairs Z = maximum number of pairs (SI390/SI/Auto LUN) NOTE: The value (Y) does not include Auto LUN XP, Flex Copy XP, Hitachi FlashCopy Mirroring, Hitachi FlashCopy Mirroring Version 2, and Snapshot XP pairs.
• Progress: The information according to the pair status is displayed as shown in the following table. Table 13 Displayed information in progress Pair Status Displayed Information Simplex - - - is displayed. Pending The progress (%) of copying. Duplex Identical data (%) of S-VOL and T-VOL. SP-Pend Copy completed data (%). V-Split Copy completed data (%). Split Identical data (%) of S-VOL and T-VOL. Resync Identical data (%) of S-VOL and T-VOL.
Table 15 List of ShadowImage pop-up menu commands (continued) Command Feature Change Reserve Opens the Set Reserve Attribute or Reset Reserve Attribute window, which sets/resets the SI390 reserve attribute. Display Filter Opens the Display Filter window, which filters the volumes displayed in the Volume List box. FlashCopy Info Opens the FlashCopy Information panel that displays the information of the resources used by FlashCopy Mirror Version 2.
• Volume Information: The emulation type and the capacity of the logical device (LDEV). • The Pair Information box displays the following: • Source Vol: The source volume (S-VOL). The left of the colon (:) shows the CU image. The right of the colon (:) shows the ID of the logical device (LDEV). • Status: The status of the pair. • Target Vol: The target volume (T-VOL). The left of the colon (:) shows the CU image. The right of the colon (:) shows the ID of the logical device (LDEV).
• Select the Reserved check box to display reserved or unreserved volumes. If you select the Reserved check box, only reserved volumes are displayed in the Volume List box. If you clear the Reserved check box, only unreserved volumes are displayed. • Selecting the Non-Pair check box displays non-paired (simplex) volumes. • Use the Pair Status box to filter the pairs displayed in the Volume List box by pair status: Pending, Duplex, Split, Resync, Suspend, Resync-R, V-Split, SP-Pend, Deleting, and F-Copy.
NOTE: To display the Delete command, select a volume or pair, and then right-click to display the pop-up menu. • The Delete All command cancels all operations displayed in the Preset Volume List box. NOTE: To display the All Delete command, deselect any volume or pair, and then right-click to display the pop-up menu. • The Detail command displays the Error window, which displays the error code and message for the failed operation (see ”ShadowImage Error Window” on page 95).
• Total differential tables: The total number of differential tables that can be used for FlashCopy Mirror Version 2 operation. • Remaining differential pair table(s): The remaining number of differential tables that can be used for FlashCopy Mirror Version 2 operation. NOTE: In addition to FlashCopy Mirror Version 2, ShadowImage, ShadowImage for z/OS, Flex Copy XP, Snapshot XP, and Auto LUN XP, use differential tables.
NOTE: The reserve attribute is only required for SI390 operations on Command View XP or XP Remote Web Console. The PPRC commands require that the potential T-VOLs are offline to the host, but do not require that the T-VOLs have the reserve attribute setting. Figure 27 Set Reserve Attribute window The Set Reserve Attribute window displays the unreserved volume(s) that you selected on the ShadowImage main window. The OK button sets the reserve attribute for unreserved volume(s).
Resetting the Reserve Attribute Use the Reset Reserve Attribute window to reset the reserve attribute for (that is, unreserve) the volume(s) selected on the ShadowImage main window. To open the Reset Reserve Attribute window, select one or more reserved simplex volumes in the Volume List box on the ShadowImage main window, right-click to display the pop-up menu, and then click Change Reserve.
Adding ShadowImage Pairs CAUTION: The SI390 add pair operation overwrites all data on the T-VOLs. The user is responsible for backing up the data on the T-VOLs before adding SI390 pairs. In addition to displaying the S-VOL and T-VOL information for the pair(s) being added, you can use the Add Pair Dialog window to select the T-VOL(s) for each S-VOL, set the copy pace for all pairs being added, and start the Add Pair operation(s).
external volumes. Use the Reserve box to display the available T-VOLs by reserve attribute. CLPR indicates the cache logical partition of the T-VOL. The Set button adds the selected T-VOL to the selected S-VOL. The Change button replaces the T-VOL of the selected pair in the list with the selected T-VOL. To remove any volumes from the S-VOL or T-VOL list, select the volumes, right-click to display the pop-up menu, and then click Delete.
Split Volume Pair window can also be used to simultaneously add and split new SI390 pairs (see ”Adding and Splitting Pairs” on page 57). To open the Split Volume Pair window, select volume(s) or pair(s) in the Volume List box on the ShadowImage main window, right-click to display the pop-up menu, and then click Split Pair. NOTE: SI390 supports the CSUSPEND/PPRCOPY SUSPEND commands for splitting SI390 pairs. For more information on using PPRC commands, see ”Using PPRC Commands for ShadowImage” on page 71.
To split one or more existing SI390 pairs: 1. If you want the split T-VOLs to be identical to the S-VOLs, stop all write operations to the S-VOLs before splitting the pairs. This ensures that there are no updates to the S-VOLs while the split operations are synchronizing the T-VOLs to the S-VOLs. CAUTION: The S-VOL and T-VOL are synchronized only when the pair status changes from SP-Pend or V-Split to Split.
CAUTION: The S-VOL and T-VOL are synchronized only when the pair status changes from SP-Pend or V-Split to Split. Due to the SI390 asynchronous update copy operations, this status transition can take several minutes. 2. From the ShadowImage main window, click the CU image or LDEV in the Tree View box to filter the volumes displayed in the Volume List box (for example, to display unreserved simplex volumes). 3.
NOTE: SI390 supports the CESTPAIR/PPRCOPY ESTPAIR commands for resynchronizing split or suspended SI390 pairs. For more information on using PPRC commands, see ”Using PPRC Commands for ShadowImage” on page 71. Figure 31 Resynchronize Volume Pair window The Resynchronize Volume Pair window lists the pair(s) selected on the ShadowImage main window and shows the pair status and copy pace for each pair. Use the Copy Pace box to select the copy pace for the pairs being resynchronized: Slower, Medium, or Faster.
CAUTION: restore). Make sure to select the correct resync direction (normal/quick, or reverse/quick During the quick restore operation, the RAID levels, HDD types, and Cache LUN XP settings are swapped. To avoid performance impact due to quick restore operations: a. Verify that the S-VOL and T-VOL have the same RAID level and HDD type before performing the quick restore operation.
NOTE: The CSUSPEND/PPRCOPY SUSPEND commands execute an SI390 split operation. There is no TSO/ICKDSF command equivalent for manually suspending pairs. For more information on using PPRC commands, see ”Using PPRC Commands for ShadowImage” on page 71. Figure 32 Suspend Volume Pair window The Suspend Volume Pair window lists the pair(s) selected on the ShadowImage main window and shows the pair status and copy pace for each pair. The OK button suspends the selected pair(s).
NOTE: SI390 supports the CDELPAIR/PPRCOPY DELPAIR commands for deleting SI390 pairs. For more information on using PPRC commands, see ”Using PPRC Commands for ShadowImage” on page 71. Figure 33 Delete Volume Pair window The Delete Volume Pair window lists the pair(s) selected on the ShadowImage main window and shows the pair status and copy pace for each pair. The OK button deletes the selected pair(s). The Cancel button closes the Delete Volume Pair window and returns you to the ShadowImage main window.
To display the History window, click the History tab. The past records of ShadowImage for z/OS and FlashCopy Mirror Version 2 relationship appear in different lists. Figure 34 History window The ShadowImage History box displays the following information: • SI390 pair activity listed by: date and time, S-VOL and T-VOL ID (CU:LDEV), SI390 code and message (see Table 17). The Time button sorts the list by date and time. The Source Vol and Target Vol buttons sort the list by S-VOL or T-VOL.
Table 17 Code Message Description 47C0 - 47CF PENDING ABNORMAL END (TVOL BLOCKADE) A copy ended abnormally due to T-VOL blockade. 47D0 - 47DF PENDING ABNORMAL END A copy ended abnormally (reason other than above). 47E7 COMPULSION PAIR SUSPEND A pair was suspended compulsorily. 4B00 - 4B0F F-COPY ABNORMAL END The ShadowImage - FlashCopy operation ended abnormally.
Setting ShadowImage Options You can set options for SI390 on the Options window. To display the Options window, click the Options tab. From the Options window, select and/or clear the check boxes to set options. Figure 35 Options window The Select Option(s) box displays the check boxes of the SI390 options. For more information about the supported options, refer to ”ShadowImage Options” on page 26. To set an SI390 option: 1. From ShadowImage, click the Options tab to display the Options window.
Figure 36 CTG window The CTG window contains the following items: • Use the Tree View box, on the left of the window, to select the status (Reserved, Free or Used) or the registered ID of the consistency group that you want to display in the CTG List box. To display all the consistency groups, select Display All at the top of the Tree View box. • The CTG List box, on the right side of the window, displays all the consistency groups selected in the Tree View box.
The CTG List Box The CTG List box displays CTG-related information based on the options you select in the Tree View box. Figure 37 CTG List Box The CTG List box contains the following items: • CTG: The registered ID of each consistency group. • Group Status: The current status of each consistency group. Each consistency group is set to one of the three types of status: • Free: The consistency group is available for use. • Reserved: The consistency group is set, but the volume pairs are not registered yet.
To open the CT Group Status window, select a consistency group in the CTG List box, right-click, and then select the CTG Status command. Figure 38 CT Group Status window The CT Group Status window contains the following items: • Use the CTG list to select a consistency group and display information about it in the Pair list box. • The Pair List box displays the following registered pair-related information of the consistency group selected in the CTG list: • Source Vol: The source volume (S-VOL).
Resetting the Reserve Attribute of a Consistency Group Use the Delete CTG command to reset the reserve attribute of one or more consistency groups selected in the CTG List box. To reset the reserve attribute of one or more consistency groups: 1. From the CTG window, click the consistency group or its status displayed in the Tree View box. Confirm that the information of the consistency group that you have just selected is displayed in the CTG List box. 2.
• SCP Delay Time(sec.) displays the state-change-pending delay time that is set to the CUs in seconds. Note that the state-change-pending delay time displayed here is the same as the sate-change-pending delay time of TrueCopy for z/OS®. For details, please refer to the TrueCopy for z/OS® User's Guide. • Preset displays the number of CUs where the changes of the state-change-pending delay time are not applied to the disk subsystem yet.
The setting in the Set SCP Delay Time panel applies to the subsystem and the state-change-pending delay time changes. The items displayed in the Set SCP Delay Time panel are as follows: • SCP Delay Time(sec.) text box specifies the state-change-pending delay time in seconds (0 to 600 seconds). The text box displays the state-change-pending delay time of that is set to the CU selected in the FlashCopy(R) Mirror V2 Operations panel by default.
Table 20 PPRC commands (continued) SI390 Command View XP or XP Remote Web Console Operation TSO Command ICKDSF Command Function Restrictions Quick Resync Pair CESTPAIR PPRCOPY ESTPAIR Resynchronizes a pair, starts quick resync. The specified volume must be split, V-split or suspended Reverse Resync Pair CESTPAIR PPRCOPY ESTPAIR Resynchronizes a pair, starts reverse resync. The specified volume must be split.
Table 21 TSO command parameters (continued) Command Parameter Description (3) For a Quick Restore request, the parameter is MRQ00. This request is valid for MODE(RESYNC) only. The parameter locations and descriptions are as follows: Byte 0-6: Fixed value (xF0*7) Byte 7: Indication of MRCF. ‘M’ = MRCF Å Distinguishes SI390 from TC390. Byte 8: Subcode-1. ‘R’ = Resync Å Distinguishes resync from add. Byte 9: Subcode-2. ‘Q’ = Quick Mode Å Requests quick restore.
Table 21 TSO command parameters (continued) Command Parameter Description ONLINSEC YES = Does not check path group. NO = Checks path group. CU number or this parameter is valid only for the DKC emulation type 2105. For MODE (COPY), the path group for the T-VOL is checked. For Quick Restore or Reverse Resync request is made in MODE (RESYNC), the path group for both the primary volume (S-VOL) and target volume (T-VOL) is checked. CSUSPEND DEVN Device number.
Table 22 ICKDSF command parameters Command Parameter Description ESTPAIR DDNAME | SYSNAME | UNITADDRESS DDNAME = dname = JCL statement identifying the volume. PRI Primary volume (S-VOL): SSID, serial number, channel connection address. SYSNAME = sysxxx = SYSNAME in the ASSGN system control statement. UNITADDRESS = ccuu = device number. You can set an additional parameter corresponding to each request instead of a serial number.
Table 22 ICKDSF command parameters (continued) Command Parameter Description MODE COPY = Initial full-volume copy. NOCOPY = Same as COPY. RESYNC = Re-established a split or suspended volume pair. PACE For DKC emulation type 2105: Always medium. For others: 1 (slow), other than 1 (medium). ESTPAIR CRIT Not applicable. MSGREQ YES = Applicable. NO = Not applicable. SUSPEND LSS Primary volume CU number, secondary volume CU number (only for the DKC emulation type 2105).
Table 22 ICKDSF command parameters (continued) Command Parameter Description PATHS Not applicable. RECOVER PPRCOPY RECOVER is not used for SI390. PPRC Restrictions Table 23 lists and describes the restrictions for using PPRC commands with SI390 volumes. Table 24 lists the conditions for accepting TSO/ICKDSF commands. Table 23 Restrictions for PPRC commands Command/Parameter Restriction Error Report ESTPAIR Command SUSPEND Command Do not issue ESTPAIR or SUSPEND command to a PENDING device.
PPRC Commands with ShadowImage and TrueCopy Both SI390 and TC390 support PPRC commands. The user must ensure that commands are being executed by the correct program against the correct volumes. A PPRC command issued to the XP1024/XP128/XP12000/XP10000 will be executed by SI390 against SI390 pairs if all of the following conditions are met. If any of these conditions is not met, the PPRC command will be executed by TC390 against TC390 pairs. 1.
Table 26 PSF and DEVSERV results for ShadowImage volumes (continued) Pair Status PSF Read Subsystem Data DEVSERV Sense Subsystem Status S-VOL T-VOL S-VOL T-VOL SP-Pend PPRI-PNDG PSEC-PNDG PPRI-PNDG PSEC-PNDG V-Split PPRI-SUSP PSEC-SUSP PPRI-SUSP SIMPLEX Split PPRI-SUSP PSEC-SUSP PPRI-SUSP SIMPLEX Suspend PPRI-SUSP PSEC-SUSP PPRI-SUSP PSEC-SUSP Resync PPRI-PNDG PSEC-PNDG PPRI-PNDG PSEC-PNDG NOTE: PPRIMARY and PSECONDRY indicate that the volume is in the DUPLEX state.
• If the XP1024/XP128/XP12000/XP10000 contains both SI390 and TC390 pairs, the CQUERY and PPRCOPY QUERY commands will report the TC390 pair status. NOTE: To obtain the HRMCF pair status, issue the status command to the SI390 T-VOL or use the SI390 remote console software to view the SI390 pair status. • If an S-VOL has multiple T-VOLs, the status command will report pair status for the pair whose T-VOL has the lowest LDEV ID.
NOTE: Status display is the same as the CQUERY TSO command. Example: DEVSERV Command 97244 97244 13:04:37.39 13:04:38.57 Table 27 DS P,DE80,1 IEE459I 13.04.37 DEVSERV PATHS 692 692 UNIT DTYPE M CNT VOLSER CHPID=PATH STATUS 692 RTYPE SSID CFW TC DFW PIN DC-STATE CCA DCA 692 DE80,33903 ,0,000,DKDE80,54=+ 1C=+ D4=+ 9C=+ 692 0080 Y YY. YY.
Example: PPRCOPY SUSPEND Command //EPAIR JOB // EXEC PGM=ICKDSF //SYSPRINT DD SYSOUT=* //DD1 DD UNIT=SYSDA,DISP=SHR,VOL=SER=DKDE80 //SYSIN DD * PPRCOPY SUSPEND DDNAME(DD1) PRI(X’0080’,30158,X’00’) SEC(X’0080’,30158,X’01’) /* // CSUSPEND QUIESCE Parameter CAUTION: The CSUSPEND QUIESCE option has been disabled by APAR OW15247 or APAR OW15248. For detailed information on the QUIESCE option, refer to either of these APARs.
NOTE: If an SI390 pair is suspended because of an internal disk array error condition, the QUIESCE option is applied. In this case, release the QUIESCE condition by deleting the pair. SI390 and TC390 are processed independently. The CSUSPEND/QUIESCE command is effective for either the SI390 or TC390 pair specified in the command.
Setting and Resetting the At-Time Split Time: ATSPLIT Use the ATSPLIT command to set or reset the time to perform the At-Time Split operation. Table 30 Parameters of ATSPLIT command Parameter Description DEVN Use this parameter to specify the four-digit device address. When a four-digit device address is specified, an ATSPLIT command will be issued to the specified device. The specified device must be an arbitrary S-VOL belonging to the consistency group that you intend to split.
Displaying the Status of the Consistency Group: ATQUERY The ATQUERY command is used to display the status of the consistency group.
T-VOL where the T-VOL (the virtual or physical copy of the S-VOL) is available for both read and write operations. When you establish a relationship for an ShadowImage - FlashCopy pair, you can specify a range of data to be copied, which is called the “extent.” When the extent data copy is complete, the relationship ends automatically. You can establish an ShadowImage - FlashCopy pair not only for SI390 simplex volumes, but also for SI390 S-VOL or T-VOL in the split or duplex status.
Table 33 describes ShadowImage - FlashCopy pair status condition. Table 33 ShadowImage - FlashCopy pair status condition Status Description Host Status S-VOL Access T-VOL Access F-Copy ShadowImage - FlashCopy is requested with host commands. The S-VOL differential data is copied to the T-VOL in the background. When the NOCOPY option is specified, no background copy is performed. S-VOL = SIMPLEX Read/write. Read/write, can be varied online.
The following figure shows an example of combining ShadowImage - FlashCopy and SI390 pairs in the L1 and L2 pairs. Figure 42 Possible combination of ShadowImage - FlashCopy and Slz and SI390 pairs The following table shows the relationship between the L1 pair status and the availability of SI390 or ShadowImage - FlashCopy pair operations on the associated L2 pairs. Table 36 shows the relationship between the L2 pair status and the availability of pair operations on the associated L1 pairs.
NOTE: You cannot create a pair that has a T-VOL shared with the S-VOL of an L1 pair. Combining ShadowImage - FlashCopy With Other Copy Solutions You can combine an ShadowImage - FlashCopy pair with a TC390 or XRC pair (see Table 37 and Table 38).
NOTE: For IBM FlashCopy and PPRC, you can create a PPRC pair that includes a volume functioning as both a FlashCopy T-VOL and a PPRC primary volume, and a PPRC pair that includes a volume functioning as both a FlashCopy T-VOL and a PPRC secondary volume.
Example: DFSMSdss Commands //COPYFULL JOB..... //* //INSTIMG EXEC PGM=ADRDSSU //SYSPRINT DD SYSOUT=* //SYSUDUMP DD SYSOUT=V,OUTLIM=3000 //SYSIN DD * COPY FULL INDYNAM (SORCEV) OUTDYNAM (TRGVOL) COPYVOLID /* ShadowImage - FlashCopy can establish a relationship for one volume pair at a time. When ShadowImage - FlashCopy copy is requested for a volume pair in the F-Copy status, DFSMSdss identifies the request as an SI390 copy request through the host and performs SI390 copy operations.
NOTE: To use the following PPRC TSO commands, you must add the command names to the AUTHCMD PARM of IKJTSOxx that is a member of SYS1.PARMLIB, because the system is protected by RACF Facility. Table 40 PPRC TSO commands ShadowImage FlashCopy Operation PPRC TSO Command Function Restrictions Add ShadowImage FlashCopy Pair FCESTABL Establishes a relationship between the source and T-VOLs. The specified volume must be simplex.
copying Dataset 2 only. If the EXTENTS parameter is not specified, the entire source volume is copied to the T-VOL. Figure 45 Copying Specified Dataset by Specifying EXTENTS Parameter Using TSO (FCESTABL) Command To copy one or more dataset using the TSO (FCESTABL) command: 1. Check the VTOC list to confirm VTOC (including INDEX VTOC) and the address (cylinder number and header number) of the dataset(s) that you want to copy. 2. Vary the T-VOL offline. 3. Execute the FCESTABL command.
Displaying ShadowImage - FlashCopy Pair Status: FCQUERY The FCQUERY command can be used to display ShadowImage - FlashCopy pair status. The following shows an example of FCQUERY command. Example: FCQUERY Command ANTF0090IF DEVN SSID 0A4D 2830 ____ 2830 Table 42 CQUERY Formatted LSS CCA CU SERIAL 03 0D 2105 0000325476 03 07 2105 0000325476 STATUS FC . . . . . 88% FC . . . . . . . . Status displayed by FCQUERY command Displayed Status Description SIMPLEX Volume is in the simplex status.
Table 43 General ShadowImage troubleshooting (continued) Error Corrective Action An SI390 error message is displayed on the Command View management station or XP Remote Web Console. Window” on page 95. There is a problem with the management station. Save the Java log file on the management station and report to HP technical support.
Overview of Compatible Mirroring for IBM FlashCopy Version2 The FlashCopy Mirror Version 2 function provides a fast data replication capability. This function allows you to copy the source data to a targeted volume virtually or physically. Creating the pair by FlashCopy Mirror Version 2 is called “establishing relationship”. Once a FlashCopy Mirror Version 2 pair is created, hosts can access data that is copied to the targeted volume.
Table 45 shows the emulation types supported by FlashCopy Mirror Version 2, and the condition for combination of S-VOL and T-VOL.
Specifying COPY mode or NOCOPY mode Before starting the copy operation, FlashCopy Mirror Version 2 allows you to select the mode to run the copy operation between COPY mode and NOCOPY mode. When you do not select the mode, FlashCopy Mirror Version 2 automatically selects COPY mode. When you select COPY mode, FlashCopy Mirror Version 2 copies all the data in the S-VOL to the T-VOL. This process is called “background copying”.
CAUTION: When the NOCOPY mode is selected, even if all the data in the S-VOL is copied to the T-VOL by the on-demand copying process, the FlashCopy Mirror Version 2 does not automatically withdraw the pair. So, when you selected NOCOPY mode, you must withdraw the pair by using FCWITHDR command. For details about FCWITHDR command, see ”Withdrawing FlashCopy Mirror Version 2 Pairs: FCWITHDR” on page 123.
Table 46 shows the compatibility between the FlashCopy Mirror Version 2 functions and the user interface functions. Table 46 Compatibility between FlashCopy Mirror Version 2 and User Interface Functions User Interface DFSMSdss TSO Function Multiple relations Functions Volume copying Dataset copying COPY mode NO COPY mode Supported Supported Supported Supported COPY mode Supported Supported Supported NOCOPY mode Supported Supported N/A 1 N/A N/A 1.
. Figure 51 Example of Using Consistency Group with FlashCopy(R) Mirror Version 2: Copying Data that is Stored over Multiple Volumes Figure 52 Example of Using Consistency Group with FlashCopy(R) Mirror Version 2: Copying Multiple Data that are Stored over Multiple Volumes Figure 51 illustrates the example of copying the data stored over the volumes #1-#3 to the volumes #4-#6. You need to create pairs of volume #1 and #4, #2 and #5, and #3 and #6, then copy the data.
NOTE: When FlashCopy® Mirror Version 2 and TCz share volumes, the results of operations such as creating pairs will differ according to whether you are using a consistency group or not. For details, ”Combining Compatible Mirroring for IBM® FlashCopy® Version 2 With ShadowImage for z/OS®” on page 109. Maximum Number of FlashCopy Mirror Version 2 Pairs This section describes the maximum number of relations assuming that you do not use the relationship expansion function.
Round up the number to the nearest whole number. For example, in case of a volume for which the emulation type is 3390-3 and the number of cylinders of the divided volume is 3,390 (x in the preceding expression), the calculation of the total number of the differential table is as follows: (3,390 + 6) x 15 ÷ (1,916 x 32) = 0.81836 When you round up 0.81836 to the nearest whole number, it becomes 1. Therefore, the total number of the differential table for one pair is 1 when emulation type is 3390-3.
• Creating pairs by dataset copying To create pairs between extents, the same number of resources listed under the column “Number of resources used per pair” (see Table 47) is necessary, provided that no extents in the same volume overlap. If the extents used for establishing the pairs overlap, the number of resources required to establish the relations is the number of resources listed under the column “Number of resources used per pair” multiplied by the number of extents that overlap.
Figure 57 Copying Data in Two Extents that Overlap (Two T-VOLs) Figure 58 Copying One Extent to Another in the Same Volume Table 48 provides the calculation examples of the required resources according to the patterns of copying.
Table 48 Referential Examples for Calculating the Number of Resources Required to Create the FlashCopy Mirror Version 2 Pairs (continued) Copy Patterns Required number of resources Copying Data in Two Extents that Overlap (Two T-VOLs) 3380-3, 3390-1, 3390-2, 3390-3,3390-3R 3390-9 3390-L S-VOL T-VOL Total S-VOL T-VOL 2 (1 x 2) 1 (1 + 1) 4 6 (2 x 3) 21 N/A 2 61 Total 3390-M S-VOL T-VOL Total S-VOL T-VOL Total 6 12 (3 + 3) 18 (9 x 2) 18 (9 + 9) 36 34 (17 x 2) 34 68 (17 + 17) N/A
The following figure shows the example of when 7 pairs are created with 3390-3 volumes, and 3 pairs are created with 3390-L volumes (32,769 CYL). Figure 59 Referential Example for Calculating the Number of Pairs According to Figure 59, the total number of resources used per pair is calculated as: Resources used for A - H = (3 + 1) + 1 + 1 + 1 + 1 + 1 + (9 x 3) + 9 + 9 = 54.
2. Withdraw all the relationships to delete FlashCopy Mirror pairs. Use Command View XP, XP Remote Web Console, or host command to select and delete all the settings that use FlashCopy Mirror. 3. Check that all the FlashCopy Mirror pairs are deleted. You can use Command View XP, XP Remote Web Console, or FCQUERY command to check if all the FlashCopy Mirror pairs are deleted. For details about FCQUERY command, see ”Displaying Information on FlashCopy Mirror Version 2 Pairs: FCQUERY” on page 134. 4.
6. Set the devices that were set offline back again to online. The host recognizes that the FlashCopy Mirror Version 2 was uninstalled. 7. Execute the devserv command with the VALIDATE option of QDASD to the devices in the subsystem. For the example of the devserv command, see Table 52 on page 111. 8. Perform the mainframe host path offline/online operation from your host. NOTE: • You need to perform offline/online operation once to one device used for FlashCopy Mirror Version 2 in each CU.
The table below is shows the operations that can be performed on the FlashCopy Mirror Version 2 pairs.
• The case the T-VOL of the FlashCopy Mirror Version 2 pair and the T-VOL of the Siz pair is shared. Figure 61 Cases When FlashCopy Mirror Version 2 and SIz Cannot be Used in Conjunction When you use FlashCopy Mirror Version 2, you cannot create pairs sharing the volumes shown in Figure 61.
Figure 62 FlashCopy® Mirror Version 2 and TCz: Non-sharable combination NOTE: For IBM FlashCopy and PPRC, you can create a PPRC pair that includes a volume that functions as both a FlashCopy T-VOL and a PPRC primary volume, and a PPRC pair that includes a volume that functions as both a FlashCopy T-VOL and a PPRC T-VOL. When you share FlashCopy® Mirror Version 2 S-VOL and the volume of TCzA pair, you need to: • Set the local mode (Mode 20 and Mode 190) to ON at RCU.
Table 53 Volume Share of FlashCopy® Mirror Version 2 S-VOL and TCz Shared TCz Pair Volume TCzA Status of TCz Pair Duplex Pending Duplex Suspend M-Vol OK OK OK R-Vol No1 No1 OK 1 You cannot create the FlashCopy® Mirror Version 2 pair since the data consistency of the FlashCopy® Mirror Version 2 T-VOL will not be insured.
3. Set the TCzA R-VOL to online. The host will be able to recognize the dataset on the TCzA R-VOL and figure out the extent for creating a FlashCopy® Mirror Version 2 pair. NOTE: If the same host is connected to both TCzA M-VOL and R-VOL, the R-VOL label must be rewritten. 4. Use DFSMS to create a FlashCopy® Mirror Version 2 pair.
Combining Compatible Mirroring for IBM® FlashCopy® Version 2 With CC The following table shows combination of the volumes when you use FlashCopy® Mirror Version 2 with CC. FlashCopy Mirror Version 2 CC P-VOL S-VOL S-VOL OK OK T-VOL NO NO* *Do not share FlashCopy® Mirror Version 2 T-VOL with CC S-VOL. If a T-VOL (S-VOL) is shared by both FlashCopy® Mirror Version 2 and CC, the data in the T-VOL (S-VOL) will be overwritten by the two programs and will be destroyed.
Using Compatible Mirroring for IBM FlashCopy Version 2 Host Commands FlashCopy Mirror Version 2 supports both DFSMSdss commands and TSO PPRC commands to enable you to perform FlashCopy Mirror Version 2 operations from the zSeries and S/390 host system. The operation system versions that support FlashCopy Mirror Version 2 are OS/390 V2R10 and z/OS V1R0 and higher. An appropriate PTF is necessary for each. This user guide does not provide complete instructions for using commands from the host system.
When DFSMSdss command “COPYFULL” is executed, all the datasets on the S-VOL are copied to the T-VOL (see Figure 64). Volume area that is not allocated as a dataset is not copied. Figure 64 Copying All Datasets Using DFSMSdss Command (COPYFULL) Creating FlashCopy Mirror Version 2 Pairs by Dataset Copying The DFSMSdss command used to process FlashCopy Mirror Version 2 dataset copy operation is COPY DS.
DUMPCONDITIONING is used when you want to specify that the purpose of the copy operation is to create a backup copy and not for using the copied volume for application. • FCNOCOPY This command sets the copy operation mode to NOCOPY mode. When this command is specified, the background copying process is omitted from the copy operation. • FASTERREPLICATION See Table 56 for the explanation of the available parameters of this command.
• DEBUG This option is for outputting error information in case an error occurs during the copy operation. Therefore, by specifying this option, you will be able to receive information describing the error and its cause(s) in case FlashCopy Mirror Version 2 copy operation fails. You can also specify the amount of error information you want to receive. Deleting FlashCopy Mirror Version 2 Pairs There is no DFSMSdss command to delete FlashCopy Mirror Version 2 pairs.
The table below lists and describes the parameters of PPRC TSO commands supported by FlashCopy Mirror Version 2. Table 58 Parameters of PPRC TSO Commands Supported by FlashCopy Mirror Version 2 Command Parameter Description FCESTABL SDEVN Source device number. Specify the number (device address) of the S-VOL on which you want to perform FCESTABL command. (This parameter is essential.) TDEVN Target device number.
Table 58 Parameters of PPRC TSO Commands Supported by FlashCopy Mirror Version 2 (continued) Command Parameter Description FCWITHDR SDEVN Source device number. Specify the number (device address) of the S-VOL on which you want to perform FCWITHDR command. TDEVN Target device number. Specify the number (device address) of the T-VOL on which you want to perform FCWITHDR command.
extent(s) specified by the XTNTLTS parameter. For example, when you copy only the “dataset 2", the copy operation processes as shown in Figure 67. Figure 67 Copying a Dataset by Using TSO (FCESTABL) Command with XTNTLTS Parameter Specified Procedure for Volume Copying To perform volume copying by using the TSO command (FCESTABL): 1. Set the T-VOL to offline, or set the ONLINTGT parameter of the FCESTABL command to YES before proceeding to the next step. 2.
6. If the T-VOL is set to offline in step 4, set this volume back to online. This step is not necessary if the ONLINTGT parameter of the FCESTABL command is set to YES. NOTE: FCESTABL command can only be executed once per FlashCopy Mirror Version 2 pair. In other words, you cannot execute this command repeatedly for the same FlashCopy Mirror Version 2 pair. Figure 68 shows an example of how FCESTABL command is used.
Table 59 describes the parameters of FCWITHDR command and the applicable combinations. Table 59 Case No. Parameters of FCWITHDR Command and Applicable Combinations SDEVN TDEVN DEVN DDSW XTNTLST Source Target ACTION Process 1 Not specified Specified Not specified NO Not specified Not specified Not specified All the relationships established with the copy target extents existing in the device specified by TDEVN are withdrawn.
Table 59 Case No. 5 Parameters of FCWITHDR Command and Applicable Combinations (continued) SDEVN Specified TDEVN Specified or not specified DEVN Not specified DDSW YES XTNTLST Source Target Not specified Not specified ACTION Process Not specified All the relationships established with the extents in the source or target device specified by SDEVN are withdrawn.
Table 59 Parameters of FCWITHDR Command and Applicable Combinations (continued) Case No. SDEVN TDEVN DEVN DDSW XTNTLST Source Target ACTION Process 6 Specified Specified or not specified Not specified YES Specified Specified Not specified Among the relationships established with the device specified by SDEVN, all the relationships that partly or entirely include the copy target extents specified by the XTNTLST parameter are withdrawn.
relationships before executing the command above, and after executing the command, there is only one relationship. Figure 72 Example of FCWITHDR Command (TDEVN: specified, DDSW = NO) • Case 2: FCWITHDR command (TDEVN: specified, DDSW = NO, XTNTLST parameter specified) Below is an example of the command description for Case 2. This example requests the withdrawal of all the relationships established with the copy target extents included in the specified extents within the device numbered 4203.
In short, there are two relationships before executing the command above, and after executing the command, there is only one relationship. Figure 74 Example(1) of FCWITHDR Command (TDEVN: specified, DDSW = NO, XTNTLST parameter specified) Below is another example of the command description for Case 2. Similar to the previous example, this example requests the withdrawal of all the relationships established with the copy target extents included in the specified extents within the device numbered 4203.
By executing the command described above, the relationship established with the specified target, Dataset 3, is not withdrawn because the specified extent within the device numbered 4203 is only a part of Dataset 3. Figure 76 Example(2) of FCWITHDR Command (TDEVN: specified, DDSW = NO, XTNTLST parameter specified) • Case 3: FCWITHDR command (SDEVN and TDEVN: specified, DDSW = NO) Below is an example of the command description for Case 3.
there are three relationships before executing the command above, and after executing the command, there are only two relationships. Figure 78 Example of FCWITHDR Command (TDEVN: specified, DDSW = NO) • Case 4: FCWITHDR command (SDEVN and TDEVN: specified, DDSW = NO, XTNTLST parameter specified) Below is an example of the command description for Case 4.
Below is another example of the command description for Case 4. Similar to the previous example, this example requests the withdrawal of the relationships established within the copy source extent in the device numbered 4202 and the copy target extent in the device numbered 4203.
same content represented by a different description, both requesting the withdrawal of all the relationships established with the device numbered 4202. FCWITHDR SDEVN(X'4202') DDSW(YES) FCWITHDR SDEVN(X'4202') TDEVN(X'4203') DDSW(YES) Figure 84 Example of FCWITHDR Command Description (for Case 5) By executing the command described above, the relations established with Dataset 1 and Dataset 2 in the device numbered 4202 are withdrawn.
There are three relationships before executing the command above, and after executing the command, there is only one relationship. Figure 87 Example of FCWITHDR Command (SDEVN and TDEVN: specified, DDSW = YES, XTNTLST parameter specified) NOTE: When the FCWITHDR command is executed with DDSW parameter set to YES and XTNTLST parameter specified, only the XTNTLST parameter values specified for the copy source extent are put into effect.
FCWITHDR DEVN(X'4202') ACTION(THAW) Figure 88 Example of FCWITHDR Command Description (for Case 7) Since no relationship is withdrawn by performing the abovementioned command, there will be no change in the number of relationships after using the command. Note that even if you do not issue this command, the write operation to volumes may be resumed automatically if the state-change-pending delay time elapses. For information about the state-change-pending delay time, see ”The Detail Window” on page 47.
Table 60 Information Displayed by FCQUERY Command (continued) Displayed item Displayed content CCA Device number CU DKC emulation type SERIAL Serial number ACT Number of active FlashCopy Mirror Version 2 pairs. See Figure 91. MAX Maximum number of pairs that can be created with the device specified by DEVN. XC S Volume specified by DEVN is currently used as an S-VOL of the XRC pair, an At-Time Split volume for SIz, or an asynchronous M-VOL of the TCz pair.
• If data on the shared memory is not volatilized and not lost: The status before powering off will be maintained. As for the relationships in COPY mode, background copying will automatically restart when you power on the disk array. • If data on the shared memory is volatilized and lost: If relationships exist before powering off the disk array, the T-VOLs will become blocked and inaccessible from hosts when you power on the disk array. Thus, the host does not access the inconsistent data in the T-VOLs.
Relationship Between Compatible Mirroring for IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2 Table 61 Differences Between FlashCopy Mirror and FlashCopy Mirror Version 2 No. Compared item FlashCopy Mirror FlashCopy Mirror Version 2 1 Required software and memory ShadowImage for z/OS software ShadowImage for z/OS software FlashCopy Mirror software FlashCopy Mirror Version 2 software Additional shared memory may also be necessary.
Table 61 Differences Between FlashCopy Mirror and FlashCopy Mirror Version 2 (continued) No. Compared item FlashCopy Mirror FlashCopy Mirror Version 2 11 TSO command Up to 5 extents can be specified. Up to 32 extents can be specified. Not supported. Extents at different positions can be copied. FCESTABL EXTENTS parameter 12 TSO command FCESTABL Up to 32 extents can be specified.
Table 62 Differences Between IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2 No. Compared item IBM FlashCopy FlashCopy Mirror Version 2 3 Sharing T-VOL with other copy solutions Pairs that include the following shared volume can be created: Not supported.
Table 62 Differences Between IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2 No. Compared item IBM FlashCopy FlashCopy Mirror Version 2 7 FCWITHDR command The command withdraws the copy targets of pairs existing within the extents specified as the target, provided that: The command withdraws the copy targets of pairs existing within the extents specified as the target.
FlashCopy Mirror Version 2 does not support the following parameters of TSO commands: • FC Establish command • DEVN (devno) • SOURCE (srcid) • TARGET (tgtid) • OPENDVCS • REMOTE • SSID • MODE (NOCOPY2COPY) • TGTPPRIM • INCREMENTAL • FC Query command • QRDEVC (dvcid) • OPENDVCS • REMOTE • QRYSSID • UNFORMAT • FC Withdraw command • DEVN (devno) • SOURCE (srcid) • TARGET (tgtid) • OPENDVCS • REMOTE • SSID ShadowImage for z/OS user guide 141
ShadowImage for the XP1024/XP128/XP12000/XP10000
Index A adding new pairs using PPRC 79 At-Time Split function SI390 28 audience, documentation 9 authorized resellers, HP 11, 12 C conventions, document 10 copy operations suppressing 14 temporarily stopping 14 Copy Threshold option 14 CTG screen 65 customer support 10 D deleting volume pairs 61 volume pairs using PPRC 83 DEVSERV commands 78, 79 displaying pair status using PPRC 79 document conventions 10 documentation, related 9 H help HP technical support 10 Host I/O Performance option 14 SI390 27 host
pairs 60 Swap&Freeze option SI390 27 T TC390 sharing volumes with SI390 36 technical support, HP 10 troubleshooting SI390 94 TSO commands.
