Explanation: UNITNAME(unitname) is
an optional parameter identifying the type of unit that should be
specified the first time DFSMShsm requests that a scratch tape be
mounted during backup or dump.
The BACKUP and DUMP functions use the same types of tape units.
For unitname, substitute the type of tape unit.
The following are valid types of tape units:
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. If
you specify:
- 3480 or 3480X, you use all the functions of the 3480 Magnetic
Tape Subsystem.
- 3490, you use all the functions of the 3490 Magnetic Tape Subsystem.
- 3590-1, you use all the functions of the 3590 Magnetic Tape Subsystem.
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: - For DUMP functions, if you want to specify a reel-type tape, you
must use the DEFINE DUMPCLASS command.
- For the CDS Backup function, if you want to specify a reel-type
tape, you must use the SETSYS CDSVERSIONBACKUP (BACKUPDEVICECATEGORY(TAPE(UNITNAME)))
command.
- You cannot specify an esoteric unit name that represents DASD;
it must represent tape.
- DFSMShsm does not use UNITNAME when it requests that a scratch
volume be mounted while continuing from another volume. Instead,
DFSMShsm uses the same unit the volume was mounted on.