Determining the recovery site storage capacity

As part of planning for XRC installation, you must consider the number and type of disk volumes, according to the steps outlined in Table 1.

Table 1. Steps for disk volume determination
Stage	Description
Determine the number of necessary storage subsystem disk volumes.	Assume that you must copy all volumes from the primary subsystem to the recovery system. You can then consider each volume individually to determine if you will 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 system operations.