RDF/IMP and IMPX System Management Manual (RDF 1.3+)

Entering RDFCOM Commands
Compaq NonStop™ RDF/IMP and IMPX System Management Manual—522204-001
8-19
Command Overview
Use the DELETE VOLUME command if an update volume on the backup system
becomes unusable and you want RDF to continue maintaining the other volumes. In
such a case, you must stop RDF at the primary system, issue the DELETE VOLUME
command, and then restart RDF.
When it is convenient to do so, you can resynchronize the affected volume, configure a
new updater process by issuing appropriate SET VOLUME commands, and then issue
an ADD VOLUME command to restart RDF protection for the affected primary volume.
Before you can remove an image trail with the DELETE IMAGETRAIL command, you
must delete all updater processes that are configured to that image trail. The DELETE
IMAGETRAIL command then deletes the configuration record for the image trail and
all image files currently belonging to that trail. Thus, the network connection to the
backup system must be available when you enter this command.
If you need to change an updater’s image trail volume, it is recommended that you stop
TMF; wait for RDF to stop; delete the volume; re-add the volume back into the
configuration, associating it to a different image trail volume; and then restart the TMF
and RDF subsystems. This is the only way to ensure that the backup database will
remain synchronized with the primary database.
Examples
Assume that RDF is protecting primary system data volumes $DATA01, $DATA02, and
$DATA03, and that all three volumes are configured to the MAT. Assume also that the
changes are being replicated to backup system volumes $DATA1, $DATA2, and
$DATA3, and that the updaters for those volumes are acquiring their audit data from
secondary image trail volumes $SECIT1, $SECIT2, and $SECIT3, respectively.
To delete the configuration records for the updater process and secondary image trail
associated with $DATA3, enter the following commands:
]DELETE VOLUME $DATA3
]DELETE IMAGETRAIL $SECIT3
Now assume that RDF is protecting primary system data volume $DATA06, which is
configured to auxiliary audit trail AUX01. Assume also that the changes are being
replicated to backup system volume $DATA6, and that the updater for that volume is
acquiring its audit data from secondary image trail volume $SECITB.
To delete the configuration records for the updater process and secondary image trail
associated with auxiliary audit trail AUX01, enter the following commands:
]DELETE VOLUME $DATA6 ATINDEX 1
]DELETE IMAGETRAIL $SECITB ATINDEX 1
Caution. If TMF dumps any audit trail files to disk while RDF is stopped, you must either
restore the dumped files to disk or resynchronize the primary and backup databases before
restarting RDF.