Veritas Storage Foundation 5.1 SP1: Storage and Availability Management for Oracle (5900-1504, April 2011)

Upgrading existing volumes to use Veritas Volume Manager 5.1 SP1
The procedure below describes how to upgrade a volume created using a version
older than VxVM 5.0 so that it can take advantage of Database FlashSnap.
Note the following requirements and caveats for this procedure:
■ The plexes of the DCO volume require persistent storage space on disk to be
available. To make room for the DCO plexes, you may need to add extra disks
to the disk group, or reconfigure existing volumes to free up space in the disk
group. Another way to add disk space is to use the disk group move feature to
bring in spare disks from a different disk group.
■ Existing snapshot volumes created by the vxassist command are not
supported. A combination of snapshot volumes created by vxassist and vxsnap
are also not supported.
■ You must be logged in as superuser (root) to issue the commands in the
following procedure. Additionally, all operations involving the creation or
modification using the commands vxassist or vxdg require that the user
perform the task on the master CVM node.
To upgrade an existing volume created with an earlier version of VxVM
1
Upgrade the disk group that contains the volume, to a version 120 or higher
before performing the remainder of the procedure described in this section.
Use the following command to check the version of a disk group:
# vxdg list diskgroup
To upgrade a disk group to the latest version, use the following command:
# vxdg upgrade diskgroup
2
If the volume to be upgraded has a DRL plex or subdisk from an earlier version
of VxVM, use the following command to remove this:
# vxassist [-g diskgroup] remove log volume [nlog=n]
Use the optional attribute nlog=n to specify the number, n, of logs to be
removed. By default, the vxassist command removes one log.
139Using Database FlashSnap for backup and off-host processing
Preparing hosts and storage for Database FlashSnap