Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Until the disk group is upgraded, it may still be deported back to the release from
which it was imported.
Until completion of the upgrade, the disk group can be used “as is” provided there
is no attempt to use the features of the current version. There is no "downgrade"
facility. For disk groups which are shared among multiple servers for failover or
for off-host processing, verify that the VxVM release on all potential hosts that
may use the disk group supports the diskgroup version to which you are upgrading.
Attempts to use a feature of the current version that is not a feature of the version
from which the disk group was imported results in an error message similar to
this:
VxVM vxedit ERROR V-5-1-2829 Disk group version doesn't support
feature
To use any of the new features, you must run the vxdg upgrade command to
explicitly upgrade the disk group to a version that supports those features.
All disk groups have a version number associated with them. Veritas Volume
Manager releases support a specific set of disk group versions. VxVM can import
and perform operations on a disk group of that version. The operations are limited
by what features and operations the disk group version supports.
Table 4-1 summarizes the Veritas Volume Manager releases that introduce and
support specific disk group versions.
Table 4-1
Disk group version assignments
Supports disk group versionsIntroduces disk group versionVxVM release
10101.2
15151.3
20202.0
30302.2
40402.3
50502.5
20-40, 60603.0
20-70703.1
20-80803.1.1
20-90903.2, 3.5
Creating and administering disk groups
Upgrading a disk group
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