When using the SETSYS USERUNITTABLE command to specify esoteric
tape unit names to DFSMShsm, note that DFSMShsm rejects mixed combinations
of device names in an esoteric group, with these exceptions:
- It allows the use of both 3480 and 3480X device names in a single
group. Improved Data Recording Capability (IDRC), however, is not
used with such a group because all devices in the group are treated
as 3480s. If an esoteric group associated only with 3480Xs exists,
3480s should not be added to it, because the data already written
using this esoteric tape unit name may create IDRC incompatibilities.
- The following sets of tape units are allowed into the same esoteric
because they share common write formats:
- 3592-1, 3592-2, and 3592-2E tape units, which share EFMT1
- 3592-2, 3592-2E, and 3592-3E tape units, which share EFMT2 and
EEFMT2
- 3592-3E and 3592-4E tape units, which share EFMT3 and EEFMT3
It is up to the user to ensure the drives in a mixed esoteric
will be used with a common recording technology. For example, if any
3592-1 drives are included, then all drives in the esoteric must use
EMFT1 for output. If the esoteric mixes 3592-2 and 3592-2E drives,
then all drives must be set up to use EFMT1 or EFMT2. If the esoteric
contains mixed 3592-2E and 3592-3E tape units, then all drives must
be set up to use EFMT2 or EEFMT2, the write formats they have in common.
If the esoteric contains mixed 3592-3E and 3592-4E tape units, then
all drives must be set up to use EFMT3 or EEFMT3, the write formats
they have in common.
Note: - If DFSMShsm rejects an esoteric tape unit name, it does not reject
the rest of the valid esoteric names specified in the USERUNITTABLE
command. Those names are now recognized by DFSMShsm as valid esoteric
tape unit names. Each time you specify USERUNITTABLE, the valid esoteric
tape unit names identified with this parameter replace any esoteric
tape unit names identified through a previous USERUNITTABLE parameter
of the SETSYS command.
- Related reading: