You can combine PPRC and FlashCopy® functions
to generate a third copy of a set of volumes in a PPRC configuration.
You can, for example, use this third copy for testing your disaster
recovery configuration and creating a point-in-time consistent backup
copy of a database.
The following procedure provides a method of using PPRC and FlashCopy to create a backup
copy of a volume:
- Suspend the PPRC volume pair using the CSUSPEND command.
- Issue the CRECOVER command to recover the secondary volume and
return it to SIMPLEX state.
- Vary the secondary volume online.
- Invoke FlashCopy through
DFSMSdss to take a copy from the secondary volume.
- Vary the secondary volume offline.
- Issue the CESTPAIR command with the RESYNC parameter to copy any
changed track to the secondary volume.