TMF Operations and Recovery Guide (G06.24+)

Routine Maintenance
HP NonStop TMF Operations and Recovery Guide—522417-002
2-9
Understanding Data Volume States
You can display the status for an individual data volume by entering the volume name
in the STATUS DATAVOLS command:
TMF 11> STATUS DATAVOLS $DATA1
See the TMF Reference Manual for complete instructions on using the STATUS
DATAVOLS command.
Table 2-2 describes the information in the STATUS DATAVOLS display.
Understanding Data Volume States
TMF data volumes can be in various states of operation; the current state is shown in
the STATUS DATAVOLS command display. The state of a data volume affects the
status of your transaction processing application. For example, a database application
can update records only on a data volume in the started state; this is the normal
operating state. If a data volume remains in a transitional state, stops unexpectedly, or
cannot be recognized as a TMF data volume, transaction processing can pause or
stop on that volume.
Changing the State of a Data Volume
Normally, a data volume changes from one state to another without your intervention.
The following discussion describes data volume states and gives suggestions on what
to do if you want to change the state.
Table 2-2. Understanding the STATUS DATAVOLS Display
Heading Meaning
Volume The data volume name, as specified in an ADD DATAVOLS command.
Audit Trail The audit trail that will contain the audit records from the data volume, as
specified in an ADD DATAVOLS command.
Recovery Mode Whether the audit-trail files associated with this data volume remain on
disk until they are no longer required for volume recovery. Recovery
mode is specified in an ADD DATAVOLS or ALTER DATAVOLS
command.
“Online” means that the audit-trail files that would be needed for volume
recovery of this data volume remain on the active or overflow-audit
volumes. This way, the volume recovery process does not have to
restore audit-trail files from archive media.
“Archive” means that audit-trail files do not remain on the active or
overflow-audit volumes for volume recovery. Archive mode is allowed
only if the audit trail for this data volume is configured for audit dumping.
State The operational state of the data volume, as described in the following
section.