Explanation: AUTOREUSE and NOAUTOREUSE are
mutually exclusive, optional subparameters of DUMPCLASS, specifying
whether dump volumes with retention periods in the defined class are
automatically available for reuse when automatically invalidated.
| Subparameter |
Explanation |
|---|
| AUTOREUSE |
DUMPCLASS(AUTOREUSE) specifies
that when DFSMShsm initiates the invalidation of a dump copy, the
dump volumes are automatically made available for reuse. |
| NOAUTOREUSE |
DUMPCLASS(NOAUTOREUSE) specifies
that when DFSMShsm initiates the invalidation of a dump copy, the
dump volumes are marked unavailable for selection by DFSMShsm. The
ADDVOL command can be used to identify to DFSMShsm that the volume
is available for reuse. The use of NOAUTOREUSE is dependent upon using
the SETSYS TAPEDELETION option of HSMTAPE for the dump category. |
Defaults: If neither AUTOREUSE nor NOAUTOREUSE
is specified, the default is NOAUTOREUSE when a dump class is being
defined for the first time.
If a dump class is already defined and certain characteristics
are being changed, and if neither AUTOREUSE nor NOAUTOREUSE is specified,
then the previous specification remains unchanged unless the retention
period is NOLIMIT. In this case the dump class is set for NOAUTOREUSE.
Note: - You can use the DELVOL command with the PURGE parameter to invalidate
the only valid dump copy.
- NOAUTOREUSE must be specified if volumes for this dump class are
to leave the confines of the data processing center and the SETSYS
TAPEDELETION option of HSMTAPE has been specified for this dump class.
The NOAUTOREUSE parameter prevents mount requests for volumes that
are not immediately available. These volumes must be identified to
DFSMShsm by issuing the ADDVOL command, but not until they are returned
from their off-site storage location. If AUTOREUSE is used in this
environment, then DFSMShsm may call for a specific mount for output
of a recently released tape before the tape is again physically present
in the data processing center.
- The disposition of tapes automatically made available for reuse
depends on the TAPEDELETION parameter of the SETSYS command. If you
are using the TAPEDELETION option of SCRATCH, then the tape is released
from DFSMShsm when invalidated and DFSMShsm does not know of it to
consider it for subsequent use.
- If you use NOLIMIT, you can use only the NOAUTOREUSE subparameter.