Explanation: MIGUNITNAME(unitname) is
an optional parameter identifying the type of unit that should be
specified the first time DFSMShsm requests to allocate a scratch tape
during migration. You can request several unit names for allocating
the scratch tape. For unitname specify either 3480, 3480X,
3490, 3590-1, or an esoteric name which you specify in the USERUNITTABLE
parameter of the SETSYS command. If an esoteric tape unit name is
used, the SETSYS USERUNITTABLE command must be issued prior to the
SETSYS MIGUNITNAME command.
SMS relationship: Parameter has the same
meaning when applied to SMS-managed or non-SMS-managed DASD volumes
or data sets.
SETSYS default: None.
DFSMShsm default: If you do not specify this
parameter on any SETSYS command, the DFSMShsm default is 3590-1.
Note: - You cannot specify an esoteric unit name that represents DASD;
it must represent tape.
- DFSMShsm does not use MIGUNITNAME when it requests that a scratch
volume be allocated while continuing from another volume. Instead,
DFSMShsm uses the same unit the volume was allocated on.
- If you specify MIGDENSITY and MIGUNITNAME, the density must match
the density capabilities for that type of unit. If you specify MIGUNITNAME
and do not specify MIGDENSITY, DFSMShsm uses the highest density for
the specified unit.
- If you specify an esoteric unit name with the MIGUNITNAME parameter,
you must also have identified the esoteric unit name to DFSMShsm with
the USERUNITTABLE parameter.
- You can specify the USERUNITTABLE parameter when you specify the
MIGUNITNAME parameter or you could have specified USERUNITTABLE with
a previous SETSYS command during this startup.