Veritas Volume Manager 5.0.1 Migration Guide, HP-UX 11i v3, First Edition, November 2009
Note: In many cases, if you choose the rollback method and the configuration has
changed, you receive an error and must use the full restore method..
If you used the workaround of creating symbolic links from the old LVM names
to the new VxVM names, you must remove the symbolic links you created before
beginning the rollback. Additional information is available on creating symbolic
links.
See “Planning for new VxVM logical volume names” on page 29.
This “snapshot” is kept on the root file system. The presence of this snapshot
should not be taken as assurance that full off-line backups will not be needed.
Specific information is available on backups.
See “Backing up your LVM configuration and user data” on page 27.
To rollback to LVM from the VxVM conversion, run vxvmconvert and choose
option 3. An illustration of this method is available.
See “Example: VxVM to LVM rollback” on page 52.
Warning: Do not use this option unless you are certain that you want to restore
LVM volume groups. After this is run, the VxVM disks that were created as a result
of the original conversion from LVM to VxVM no longer exists. This option is not
a full complement to vxvmconvert. It simply writes the saved LVM metadata back
on top of the disks. Those data can only be considered valid for the period of time
when the logical volumes are offline. If the VxVM configuration has been brought
online, the metadata in the rollback snapshot should be considered obsolete.
Specific information on full LVM restoration is available.
See “Full LVM restoration” on page 36.
Full LVM restoration
If you need to restore the original LVM configuration, but changes have been
made to the VxVM configuration, you cannot use the rollback option of
vxvmconvert. In this case, you must restore the user data in addition to restoring
the old LVM metadata and associated configuration files. You may need to use
this method if the disks in use by the LVM/VxVM volumes were corrupted during
or after conversion.
Note: The snapshot of LVM internal data is kept on the root file system.
Converting LVM to VxVM
Restoring the LVM volume group configuration
36