Disk space estimates for all installation libraries are documented in the program directory file on the installation medium.
CA Vtape requires a Global VCAT, a Bootstrap data set (BSDS1), and an ICF User Catalog for each CA Vtape Complex. Each CA Vtape subsystem participating in the CA Vtape complex requires a Local VCAT.
Since the Global VCAT and BSDS1 back each other up, they should be allocated on separate DASD volumes. To determine their storage requirements, the following algorithm can be used:
Control Information Area + VOLSER Area = Total Size 608 3390 tracks + Total VOLSERs / 12 = Total 3390 Tracks
A Global VCAT and BSDS1 pair containing 100,000 VOLSER records would each require:
608 3390 tracks + 100,000 / 12 = 8,932 3390 tracks
The ICF user catalog for a Global VCAT with 100,000 VOLSERs needs to be sized to handle 100,000 VSAM and 200,000 non-VSAM catalog entries.
Note: For information on calculating the size of an ICF user catalog, see the IBM DFSMS Managing Catalogs manual.
Define the catalog on a DASD volume other than the ones containing the Global VCAT and BSDS1.
Each Local VCAT requires 683 3390 tracks.
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