TMF Operations and Recovery Guide (G06.24+)

Routine Maintenance
HP NonStop TMF Operations and Recovery Guide—522417-002
2-12
Understanding Data Volume States
SCF PRIMARY command is discussed in the SCF Reference Manual for G-Series
RVUs, and the ALTER TMF, SWITCHPROCESS TMP command is explained in the
TMF Reference Manual.
State: Started
Meaning. The volume is ready to process transactions. If a data volume in this state
stops because of a physical or disk process problem, it is automatically returned to the
started state the next time it is operational.
Action. This is the normal operating state, so no action is required. If you want to stop
transaction processing on the volume, use the DISABLE DATAVOLS command. If you
want to stop all processing on the volume, use the SCF STOP DISK command
(described in the SCF Reference Manual for G-Series RVUs). See Section 3,
Occasional Operations for more information on disabling data volumes.
State: Disabling
Meaning. A DISABLE DATAVOLS command has been issued to exempt the volume
from TMF processing. This state normally lasts only a few seconds.
Action. The DISABLE DATAVOLS command normally waits for all currently running
transactions to complete before changing the volume state from disabling to disabled.
If a volume remains in the disabling state, use the STATUS TRANSACTIONS
command to identify long-running active, aborting, or hung transactions that may be
preventing the operation from completing. Use the procedures in Controlling Individual
Transactions on page 3-20 to resolve any transactions that appear to be causing
problems.
If you are unable to resolve the transactions in a timely way, or if the problem does not
appear to be related to transaction activity, use the DISABLE DATAVOLS command
with the ABRUPT option to disable the volume for TMF processing. Remember,
however, that the data on the volume might be inconsistent after you use the ABRUPT
option. For more information on the DISABLE DATAVOLS command, see the TMF
Reference Manual.
State: Disabled
Meaning. A DISABLE DATAVOLS command has been issued to exempt the volume
from TMF processing. The volume continues to be available for operations other than
TMF audited requests, and TMF continues to process transactions for other data
volumes. A data volume that is stopped this way is not automatically enabled for TMF
processing when it is restarted. A data volume must be disabled before it can be
deleted from the TMF configuration.
Caution. A data volume in the disabled state causes TMF to retain audit for volume recovery
of that volume. A data volume left in this state for a sufficient time allows the
OVERFLOWTHRESHOLD and BEGINTRANSDISABLE thresholds to come into effect.