The minimum z/OS level for CA reclaim is z/OS V1R12. Only VSAM KSDSs are eligible for CA reclaim processing. They may be catalog data sets, AIX and base clusters or temporary data sets. They may be SMS managed or not SMS managed and may be processed by VSAM or VSAM RLS. They may be created with or without a data class. They must not have been defined with the IMBED option.