TMF Operations and Recovery Guide (G06.26+)

Occasional Operations

HP NonStop TMF Operations and Recovery Guide—522417-003

3-11

Changing the Data Volume Configuration

Data volume configuration changes can have various effects on your TMF system.

Before you change the configuration, refer to system reports about typical audit-trail

capacity usage, transactions generated during normal and peak periods, and disk

space on your system: you should keep such reports in a notebook for easy reference

(see Keeping Current System Information on page 2-30).

This section discusses how data volume configuration changes can affect your system.

Before you change the configuration, consider the relationships between the data

volumes and audit trails on your system.

The DATAVOLS Configuration Commands

You can make the following data volume configuration changes only while TMF is

running:

•

To add a data volume, use the ADD DATAVOLS command.

•

To change the recovery mode attribute, use the ALTER DATAVOLS command.

•

To delete a data volume, use the DELETE DATAVOLS command.

These commands can be issued only by members of the super user group. See the

TMF Reference Manual for instructions on using these commands.

Adding New Data Volumes

You use ADD DATAVOLS commands to add data volumes to your TMF configuration.

You can add data volumes any time after issuing a START TMF command. To be

added as a data volume, the disk must be up but not already configured as either an

active-audit volume or a data volume.

When you attempt to add a data volume, TMF recognizes if the volume was part of a

previous TMF configuration and might contain files that were in a potentially

inconsistent state when the volume was last shut down. Normally, the ADD

DATAVOLS command fails for such volumes.

By reissuing the command with the IGNOREPREVIOUSCONFIG option, you can force

the volume to be added even if TMF suspects it might contain inconsistent data. If you

do this, however, the volume recovery process cannot repair any inconsistencies, even

if you return the data volume to the previous configuration environment.

Note. TMF is shipped from the factory with the $DSMSCM disk volume configured as a TMF

data volume. Although you should not remove $DSMSCM as a TMF data volume, you are free

to add other TMF data volumes to the configuration. See also the information about the

preconfiguration of active-audit volumes under Adding Another Active-Audit Volume

page 3-8.