Explanation: ARECOVERML2UNIT(unittype) specifies the type of tape unit to use in a nonspecific volume request when recovering migrated data sets to ML2 tape volumes. For unittype, substitute a valid unit type or a valid esoteric unit name. The following are valid types of tape units: 3400-3, 3400-4, 3400-5, 3400-6, 3400-9, 3480, 3480X, 3490, and 3590-1. You specify 3400-9 when your 3480 Magnetic Tape Subsystem simulates your 3420 tape drives. You can substitute an esoteric tape unit defined with the SETSYS USERUNITTABLE command. If you specify an esoteric tape unit name that does not exist in the user unit table, the command fails.
When in a mixed tape drive environment you must use a customer defined esoteric unittype since the generic will contain a mix of machine types. For example, if your tape environment has both 3590 Model H drives and 3592 Model J drives defined as 3590, then the ''3590-1'' generic will contain both of these machine types. If you intend to recover ML2 tapes on the 3592 Model J drives, create an esoteric exclusively for them, define the esoteric to DFSMShsm via the SETSYS USERUNITTABLE command, and define that esoteric as the ARECOVERML2UNIT.
SMS relationship: Parameter has the same meaning when applied to SMS-managed or non-SMS-managed DASD volumes or data sets.
DFSMShsm default: If you do not specify this parameter, the DFSMShsm default is 3590-1.