Hitachi ShadowImage for z/OS user guide Part number: HIT9503-96002 Second edition: October 2005
Legal and notice information © Copyright 2005 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor’s standard commercial license. The information contained herein is subject to change without notice.
Contents About this guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Intended audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Document conventions and symbols . . . . . . .
Setting the Reserve Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . To reserve one or more volumes for use as SI390 S-VOLs (set the reserve attribute): . . . . . . . . . . Resetting the Reserve Attribute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . To unreserve one or more volumes (reset the reserve attribute): . . . . . . . . . . . . . . . . . . . . . . . .
Establishing Multiple Relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 Specifying COPY mode or NOCOPY mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Volume Copying and Dataset Copying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Maximum Number of FlashCopy Mirror Version 2 Pairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 6 Suspend Volume Pair window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Delete Volume Pair window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 History window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables 1 2 3 4 5 6 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 Document conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ShadowImage for z/OS requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 The Number of the Control Cylinders According to the Emulation Types . . .
58 Information Displayed by FCQUERY Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 59 Differences Between FlashCopy Mirror and FlashCopy Mirror Version 2 . . . . . . . . . . . . . . . . . . . . . 125 60 Differences Between IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2. . . . . . .
About this guide This guide provides information about: • Preparing for ShadowImage Operations, page 35 • Starting ShadowImage, page 42 • Performing ShadowImage Operations, page 50 • Using PPRC Commands for ShadowImage, page 68 • Using ShadowImage - FlashCopy, page 82 • Troubleshooting, page 91 • Using Compatible Mirroring for IBM FlashCopy Version2, page 92 Intended audience This guide is intended for customers and HP authorized service providers experienced with the following: • Disk array hardware and s
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.
HP strongly recommends that customers sign-up online using the Subscriber’s choice web site at http://www.hp.com/go/e-updates. • Subscribing to this service provides you with email updates on the latest product enhancements, newest versions of drivers, and firmware documentation updates as well as instant access to numerous other product resources. • After signing-up, you can quickly locate your products by selecting Business support and then Storage under Product Category.
1 ShadowImage for the XP128/XP1024/XP10000/XP12000 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.
When an SI390 volume pair is added, the data on the S-VOL is copied to the T-VOL. During this initial copy operation and after the pair status becomes duplex, all write operations to the T-VOL are prohibited. If you need to access a T-VOL, you can split the pair to make the T-VOL accessible (the S-VOL is always accessible). While an SI390 pair is split, the XP128/XP1024/XP10000/XP12000 keeps track of all changes to the S-VOL and T-VOL as a differential bitmap.
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 68 describes and provides instructions for using PPRC commands to create and maintain SI390 volume pairs on the XP128/XP1024/XP10000/XP12000.
Table 2 ShadowImage for z/OS requirements (continued) Parameter Specification 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. If a PDEV failure occurs, SI390 pair status is not affected because of the RAID architecture. Maintenance/Update When the disk array maintenance is performed, or the microprogram is updated, you may have to add SI390 pairs again.
Table 3 The Number of the Control Cylinders According to the Emulation Types (continued) Emulation Type Number of the Control Cylinders 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 number of differential tables pe
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 XP128/XP1024/XP10000/XP12000 will accept all subsequent read and write I/O operations to the volume. Use the Reset Reserve Attribute window (see ”Resetting the Reserve Attribute” on page 51) to unreserve volumes. NOTE: When TSO or ICKDSF commands are used to establish SI390 pairs, the T-VOLs do not need to be reserved.
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 XP128/XP1024/XP10000/XP12000 will automatically suspend an SI390 pair when it cannot keep the pair mirrored for any reason. When the XP128/XP1024/XP10000/XP12000 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 XP128/XP1024/XP10000/XP12000 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.
To use the SI390 At-Time Split function by executing the PPRC TSO commands: 1. Specify the ID of the consistency group you intend to use with Command View XP or XP Remote Web Console. 2. Use the TSO ESTPAIR command to create a pair by specifying the ID of the consistency group you intend to use in this command. 3. Use the ATSPLIT command to specify the ID of the consistency group and the time to execute the Split operation. By executing the ATSPLIT command, the Split time you specified will be registered.
XP128/XP1024/XP10000/XP12000. 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 57. 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 XP128/XP1024/XP10000/XP12000 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 XP128/XP1024/XP10000/XP12000 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: • XP128/XP1024/XP10000/XP12000. All XP128/XP1024/XP10000/XP12000 hardware, microcode, and software required for SI390 operations must be installed and enabled.
Combining ShadowImage with Other Data Management Operations SI390 supports concurrent operations with the following data management functions: • 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.
• SI390 supports multiple T-VOLs for each S-VOL. If you issue a pair status query to an SI390 S-VOL, the status for only one SI390 pair is reported (the pair with the T-VOL with the lowest LDEV ID). To obtain the pair status for the SI390 pair(s) with the other T-VOL(s), you must direct the host query to the specific 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.
• Use TC390 to provide remote backup copies of SI390 S-VOLs. Figure 10 SI390 and TC390: shared S-VOL/M-VOL 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.
NOTE: This configuration does not allow SI390 and TC390 to copy at the same time. Add the SI390 pair first, and then split the pair before creating the TC390 pair. You must suspend the TC390 pair to resync the SI390 pair. The TC390 pair status cannot be changed when the SI390 pair is in the V-Split status. You cannot distinguish the Split status from the V-Split status with the PPRC command.
Table 12 lists the currency of the data on shared SIz/URz volumes based on the SIz and URz pair status.
The configuration shown in Figure 15 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. Figure 15 SIz and URz: Shared S-VOL/S-VOL The configuration shown in Figure 16 is an example of a volume that is functioning as both a URz P-VOL and an SIz S-VOL, while the S-VOL of the same URz pair is also functioning as the S-VOL of another SIz pair.
Starting ShadowImage To start SI390: 1. Click the Mainframe tab, and then click the ShadowImage button ( ). The ShadowImage main window displays the name of the connected XP128/XP1024/XP10000/XP12000, the currently selected CU image, and all of the volumes (LDEVs) installed under the current CU image.
• The Volume List box, on the upper-right side of the window, displays all available volumes on the CU image selected in the Tree View box. You can sort the volumes by source volume (CU:LDEV), status, T-VOL (CU:LDEV), copy pace, progress of copying, device emulation type, and cylinder (capacity). You can also filter the volumes by reserve attribute, by pair condition, and pair status, in the Display Filter window. To open the Display Filter window, click Display Filter.
For more information about the History and Options tabs of the ShadowImage main window, refer to ”Viewing the Past Record of Pair Operations” on page 61 and ”Setting ShadowImage Options” on page 63. The Volume List Box The Volume List box displays volume/pair information based on the filter options you select in the Tree View box. You can also filter the volumes by reserve attribute, by pair condition, and pair status by clicking Display Filter.
• CLPR (S): The S-VOL’s cache logical partition. • CLPR (T): The T-VOL’s cache logical partition. • Relationship(s): The current state of the volume in terms of whether the FlashCopy Mirror Version 2 relationship is established or not. When no relationship is established, --- is displayed. When a relationship is established, the status of the volume is displayed as shown in Table 14.
NOTE: SI390 supports the CQUERY/PPRCOPY QUERY commands for viewing SI390 pair status. For more information on using PPRC commands, see ”Using PPRC Commands for ShadowImage” on page 68. Figure 19 Detail window The Detail window has the following features: The Detail box displays the following: • Source Vol Information: The source volume ID (CU image:LDEV ID), S-VOL status, and CLPR of the S-VOL. • Volume Information: The emulation type and the capacity of the logical device (LDEV).
ShadowImage main window. You can also open the Display Filter window by using the Display Filter command. Figure 20 Display Filter window The Display Filter window has the following features: • The CLPR drop-down list allows you to display the specified cache logical partition (CLPR). • The Volume Type box: • The Internal Vol check box allows you to display the internal volumes. • The External Vol check box allows you to display the external volumes. NOTE: Both check boxes are selected by default.
The Preset Volume List Box The Preset Volume List box is located below the Volume List box, and lists the specified zSeries and S/390 operations (volume/pair information) that have not been performed in the XP128/XP1024/XP10000/XP12000. NOTE: You can use the Preset Volume List box to hold multiple settings of the same operation (for example, Add Pair) only. You cannot display different types of operations (for example, Split Pair and Resync Pair) in the Preset Volume List box at the same time.
Information window, select FlashCopy Info displayed in the pop-up menu in the ShadowImage z/OS main panel. Figure 22 FlashCopy Information pane The FlashCopy information pane displays the following information: • Total relationship tables: The total number of relationship tables that can be used for FlashCopy Mirror Version 2 operations, including relationship tables being used by FlashCopy Mirror Version 2.
Table 16 Check Boxes in FlashCopy V2 Relations Check Box Displayed Information Normal Volumes of the FlashCopy Mirror Version 2 relationships in normal status Failed Volumes of the FlashCopy Mirror Version 2 relationships in abnormal status • Volume list: Displays information about volumes that form FlashCopy Mirror Version 2 relationships. You can select volumes displayed in this volume list using the CU list and check boxes. • OK: Closes the FlashCopy Information pane.
To reserve one or more volumes for use as SI390 S-VOLs (set the reserve attribute): 1. Vary the volume(s) that you will be reserving offline. The XP128/XP1024/XP10000/XP12000 will reject all read/write I/Os to reserved volumes (except when in the split state). 2. From the ShadowImage main window, click the appropriate CU image or LDEV in the Tree View box. 3.
To unreserve one or more volumes (reset the reserve attribute): 1. Verify that the volumes you want to unreserve are no longer assigned to SI390 pairs as T-VOLs. For instructions on deleting SI390 pairs, see ”Deleting ShadowImage Pairs” on page 60. 2. From the ShadowImage main window, click the CU image or LDEV in the Tree View box. 3. Display reserved simplex volumes in the Volume List box. For example, to display reserved simplex volumes, select the Reserved check box in the Display Filter window. 4.
NOTE: SI390 supports the CESTPAIR/PPRCOPY ESTPAIR commands for adding (starting) SI390 pairs. For more information on using PPRC commands, see ”Using PPRC Commands for ShadowImage” on page 68. Figure 25 Add Pair Dialog window The Add Pair Dialog window displays the S-VOL and T-VOL information for each pair being added: CU image, LDEV ID, volume status, emulation type, capacity (cylinders). Use the Copy Pace box to select the copy pace for all pairs being added: Slower, Medium, and Faster.
NOTE: To add all pairs in the list, click Apply on the ShadowImage main window. The Cancel button closes the Add Pair Dialog window without changing the settings. If you want to add new SI390 pairs and then split them immediately so that you can access the T-VOLs as soon as possible, use the Split Pair operation instead of the Add Pair operation to establish and split new pairs at the same time (see ”Splitting ShadowImage Pairs” on page 54 for instructions). To add one or more new SI390 pairs: 1.
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 68. Figure 26 Split Volume Pair window The Split Volume Pair window lists the volume(s)/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 all pairs that you are splitting: Slower, Medium, or Faster.
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. 3. Select the pair(s) you want to split, right-click to display the pop-up menu, and then click Split Pair to open the Split Volume Pair window.
3. Select the volume(s) that will be the S-VOL(s) of the new pairs to be added and split, right-click to display the pop-up menu, and then click Split Pair to open the Split Volume Pair window. 4. Set the copy pace (Slower, Medium, or Faster) and split type (Quick or Steady) for all pairs being added and split. 5. Specify the T-VOL(s) as follows: a. Click the S-VOL. b. Click the CU image in the CU list, display either reserved or unreserved volumes, and then click the T-VOL. CAUTION: T-VOL.
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 68. Figure 27 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 68. Figure 28 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 68. Figure 29 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 30 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 ShadowImage status and history reference codes and messages (continued) 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.
To display the Options window, click the Options tab. From the Options window, select and/or clear the check boxes to set options. Figure 31 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. When the Options window is opened, it shows the current status of the option. 2.
To display the CTG window, click the CTG tab. Figure 32 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 The CTG List box displays CTG-related information based on the options you select in the Tree View box. Figure 33 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 34 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.
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 SYSNAME = sysxxx = SYSNAME in the ASSGN system control statement. UNITADDRESS = ccuu = device number. Primary volume (S-VOL): SSID, serial number, channel connection address. 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 XP128/XP1024/XP10000/XP12000 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.
PSF and DEVSERV results for ShadowImage volumes (continued) Table 26 Pair Status PSF Read Subsystem Data DEVSERV Sense Subsystem Status S-VOL T-VOL S-VOL T-VOL 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 XP128/XP1024/XP10000/XP12000 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 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. Parameters of ATSPLIT command Table 30 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 36 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 39 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 92. 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 114.
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 1 COPY mode Supported Supported Supported N/A NOCOPY mode Supported Supported N/A N/A 1.
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 49 Copying Data in Two Extents that Overlap (Two T-VOLs) Figure 50 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 3390-M S-VOL T-VOL Total S-VOL T-VOL Total S-VOL T-VOL Total S-VOL T-VOL 2 (1 x 2) 1 (1 + 1) 4 6 (2 x 3) 6 (3 + 3) 12 18 (9 x 2) 18 (9 + 9) 36 34 (17 x 2) 34 68 (17 + 17) 21 N/A 2 61 N/A 6 1
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 51 Referential Example for Calculating the Number of Pairs According to Figure 51, 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 123. 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 106. 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 53 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 53. However, if you use ShadowImage for z/OS, you can create the pair which shares FlashCopy Mirror Version 2 S-VOL and SIz T-VOL, or the pair which shares FlashCopy Mirror Version 2 T-VOL and SIz S-VOL.
Combining Compatible Mirroring for IBM FlashCopy Version 2 With Other Solutions The following table shows whether you can or cannot set attributes to the volumes in the case the volumes that are specified as S-VOL or T-VOL of a FlashCopy Mirror Version 2 pair have the attributes of Volume Retention Manager or Volume Security.
NOTE: FlashCopy Mirror Version 2 supports VSAM datasets. However, when the user specifies attributes for the copy source extents that differ from those specified for the copy target extents, DFSMSdss invokes a different program (such as IDCAMS), and, as a result, FlashCopy Mirror Version 2 may not be able to use VSAM datasets. For further information, please refer to the IBM user document mentioned above.
Figure 56 shows an example of the DFSMSdss command for processing FlashCopy Mirror Version 2 dataset copy operation. In this example, the dataset on the volume numbered FCPY05 is copied to a volume numbered FCPY06. //DSSCOPY JOB //* //INSTIMG EXEC PGM=ADRDSSU //SYSPRINT DD SYSOUT=* //SYSUDUMP DD SYSOUT=V,OUTLIM=3000 //VOL1 DD UNIT=3390,VOL=SER=FCPY05,DISP=OLD //VOL2 DD UNIT=3390,VOL=SER=FCPY06,DISP=OLD //SYSIN DD * COPY DS(INCL(SAM020.
• 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 56 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 56 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. DDSW YES = The relationships established on the volume specified as the copy source by SDEVN are withdrawn.
extent(s) specified by the XTNTLTS parameter. For example, when you copy only the “dataset 2", the copy operation processes as shown in Figure 58. Figure 58 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 59 shows an example of how FCESTABL command is used.
Table 57 Parameters of FCWITHDR Command and Applicable Combinations (continued) Case No. SDEVN TDEVN DDSW XTNTLST Process Source Target 4 Specified Specified NO Specified Specified Among the relationships established between the source device specified by SDEVN and the target device specified by TDEVN, the relationships included in the extents specified by the XTNTLST parameter are withdrawn. The relationships that are only partly included in the specified extents are not withdrawn.
• Case 1: FCWITHDR command (TDEVN: specified, DDSW = NO) Below is an example of the command description for Case 1. This example requests the withdrawal of all the relationships established with the copy target extents existing in the device numbered 4203. 50 h FCWITHDR TDEVN(X'4203') Figure 61 Example of FCWITHDR Command Description (for Case 1) By executing the command described above, the relationship established with the specified target, Dataset 3, in the device numbered 4203 is withdrawn.
In short, there are two relationships before executing the command above, and after executing the command, there is only one relationship. Figure 64 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 66 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 68 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 74 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 77 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.
CAUTION: When the relationships are withdrawn by the FCWITHDR command executed with DDSW parameter set to NO or without setting the DDSW parameter, the data integrity of the T-VOL cannot be guaranteed. CAUTION: If you use the FCWITHDR command only one time when deleting numerous relationships, a timeout might occur with the host. Use the FCWITHDR command more than one time when deleting numerous relationships.
Table 58 Information Displayed by FCQUERY Command (continued) Displayed item Displayed content Definition PC P Volume specified by DEVN is currently used as the S-VOL (M-VOL) of the SIz or TCz pair. S Volume specified by DEVN is currently used as the T-VOL (R-VOL) of the SIz or TCz pair. N Volume specified by DEVN is currently not used for SIz or TCz. S Volume specified by DEVN is currently used as the S-VOL of the Concurrent Copy pair.
Suspending FlashCopy Mirror Version 2 Pairs FlashCopy Mirror Version 2 pairs may be suspended if a hardware or software failure occurs during FlashCopy Mirror Version 2 operation. If FlashCopy Mirror Version 2 pairs are suspended, hosts may be unable to access copy target datasets. To find whether suspended FlashCopy Mirror Version 2 pairs exist within the volumes, use the ShadowImage z/OS main panel (see ”ShadowImage Main Window” on page 42).
Table 59 Differences Between FlashCopy Mirror and FlashCopy Mirror Version 2 (continued) No. Compared item FlashCopy Mirror FlashCopy Mirror Version 2 8 Using with other copy solutions FlashCopy Mirror pair can share the volume with other copy solutions such as SIz, TCz, XRC, or Concurrent Copy. FlashCopy Mirror Version 2 pair can share the volume only with SIz. 9 DFSMSdss command COPYFULL command is used to create a FlashCopy Mirror pair with the entire volume.
Differences Between IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2 Table 60 Differences Between IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2 No. Compared item IBM FlashCopy FlashCopy Mirror Version 2 1 Read access to the area not specified as the copy range in the copy target in NOCOPY mode The data on the tracks subject to read operation are not copied from the copy source to the copy target.
Table 60 Differences Between IBM FlashCopy and Compatible Mirroring for IBM FlashCopy Version 2 No. Compared item IBM FlashCopy FlashCopy Mirror Version 2 8 The operation when you establish a dataset relationship by using DFSMSdss command, and specified the source or target volume of a volume relationship as the copy target. Part of the volume relationship will be withdrawn.
Index A adding new pairs using PPRC 76 At-Time Split function SI390 28 audience, documentation 9 authorized resellers, HP 11 C conventions, document 10 copy operations suppressing 14 temporarily stopping 14 Copy Threshold option 14 CTG screen 64 customer support 10 D deleting volume pairs 60 volume pairs using PPRC 80 DEVSERV commands 75, 76 displaying pair status using PPRC 76 document conventions 10 documentation, related 9 H help HP technical support 10 Host I/O Performance option 14 SI390 27 host ser
suppressing copy operations 14 suspending pairs 59 Swap&Freeze option SI390 27 T TC390 sharing volumes with SI390 36 technical support, HP 10 troubleshooting SI390 91 TSO commands.
