As part of planning for PPRC installation, you must consider the number and type of disk volumes. Use Table 1 to determine your necessary disk capacity.
| Stage . . . | Description . . . |
|---|---|
| Determine the number of necessary recovery storage subsystem disk volumes. | Assume that all volumes from the
primary subsystem must be copied to the recovery system. You can then
consider each volume individually to determine if you need it for
recovery and subsequent application operations on the recovery system.
Example: You do not have to copy disk volumes that contain only page data sets to the recovery site storage subsystem. |
| Determine the number of disk volumes to be copied to the recovery site storage subsystem. | Consider which application and support
data sets will be needed to start applications on the recovery subsystem
at recovery time.
Example: User catalogs are a good example of such data sets. If the recovery subsystem cannot find data volumes associated with user catalogs, jobs will not start successfully after recovery. |
| Consider disk volumes | Consider what disk volumes, such as DFSMShsm migration level 1 data sets, may be needed for recovery operations. |