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Data Set Allocation

All CA Disk function allocations use SVC 99 for dynamic allocation of non-VSAM data sets. This allows allocation control products such as CA Allocate, or IBM's DFSMS products to redirect allocations.

VSAM definitions are done using SVC 26, and are also candidates for being redirected by a pooling package.

Due to SVC 99 restrictions, CA Disk does not set the DFSMS ACS &ACSENVIR variable. To keep data set allocations consistent, it is not set for VSAM allocations either.