TMF Management Programming Manual (G06.26+)

Commands and Responses
HP NonStop TMF Management Programming Manual—522420-003
5-43
ALTER CATALOG
When the number of generations specified by ZRetainDepth is reached for all
the files in an online dump, the status of the tape volume is changed to scratch
if ZReleased is ZSPI-VAL-False, or to released if ZReleased is ZTMF-VAL-
True.
Increasing the value for ZRetainDepth causes the number of tape volumes
required by TMF to increase, because more online dump generations are
retained in the TMF catalog. In addition, more audit dumps are retained
because they are needed for use with the online dump generations during file
recovery.
ZReleased
specifies the status of an online or audit dump tape volume after all the dumps
on it have been marked for deletion. The following values are valid:
ZSPI-VAL-True
The status of a tape volume is changed to released when all the dumps on
it have been marked for deletion. This status indicates that the tape is not
available for reuse in dumping or for file recovery.
ZSPI-VAL-False or ZTMF-VAL-ResetBoolean
The status of a tape volume is changed to scratch when all the dumps on it
have been marked for deletion. This status indicates that the tape can be
reused for dumping and that its contents are no longer available for file
recovery.
ZRoundRobin
specifies how scratch tapes will be allocated from the pool of available tapes.
The following values are valid:
ZSPI-VAL-True
TMF selects tapes by going through the pool completely before starting
over again.
ZSPI-VAL-False
TMF starts from the beginning of the pool every time it must select a tape.
Usage Guidelines
Only super-group users can issue this command. TMF must be stopped.
For more information about the ALTER CATALOG command, see the TMF Reference
Manual.