To execute a Compatible FlashCopy® V2 Reverse Restore operation, create a Compatible FlashCopy® V2 relationship using the Incremental FlashCopy® function, and reverse the S-VOL and the T-VOL (Reverse Restore) and then copy the differential data.
- Set the T-VOL offline.
- Specify a JCL DD statement for the DDNAME parameter or the device number of the source volume for the UNITADDRESS parameter.
- Specify the CU number, LDEV number, and device number of the T-VOL for the TARGETVOL parameter.
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Specify YES or V2 for the CHANGERECORDING parameter to execute the FLASHCPY ESTABLISH command, for example:
FLASHCPY ESTABLISH UNIT(X'7000') TARGETVOL(X'00',X'01',7001) CHANGERECORDING(YES)A Compatible FlashCopy® V2 relationship is created. If you specify YES for the CHANGERECORDING parameter, an Incremental Type1 relationship is created. If you specify V2, an Incremental Type2 relationship is created.
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Execute the
FLASHCPY ESTABLISH with the RESTORE parameter to reverse the direction of the relationship. For example:
FLASHCPY ESTABLISH UNIT(X'7001') TARGETVOL(X'00',X'00',7000) RESTORE
If the S-VOL is updated before you perform the Reverse Restore operation, only the data that has changed on the S-VOL (differential data) is copied to the T-VOL. When the T-VOL is updated, before the Reverse Restore operation is performed, only the data that has changed on the T-VOL is copied from the S-VOL.
Set the CHANGERECORDING parameter to YES or V2 to maintain the relationship after the copy process is completed and to continue tracking differential data between the S-VOL and the T-VOL. If you do not specify the CHANGERECORDING parameter, the relationship is deleted after the copy operation is completed.
When you specify YES or V2 for the CHANGERECORDING parameter, the incremental type of the original relationship is inherited. If you specify a value different from the original relationship, such as V2 for the Incremental Type1 relationship, or YES for the Incremental Type2 relationship, you cannot change the incremental type.