The disk/pack option controls the location of the set or subset. In the absence of any specification, sets and subsets are assigned to disk. When DISKPACK or PACK is stipulated but no family name appears, the set or subset is assigned to the system resource pack. When a family name follows DISKPACK or PACK, the set or subset is placed on the named pack family. Sets or subsets can also be assigned to a named pack by using the PACKNAME or FAMILYNAME option with KIND = DISKPACK or KIND = PACK. The PACKNAME and FAMILYNAME options are synonymous.