VERITAS Volume Manager 3.5 Migration Guide (August 2002)

Converting LVM Volume Groups to VxVM Disk Groups Final 24 July 2002
20 VERITAS Volume Manager Migration Guide
The details of the conversion process are shown in “Examples” on page 24.
8. Taking actions if conversion fails
Conversion can fail for any of the reasons detailed in the “Volume Group Conversion
Limitations” section. Messages from vxvmconvert will explain the type of failure, and
any actions you can take before retrying the conversion.
See “Conversion Error Messages” on page 65 for complete details of specific error
messages.
9. Implementing changes for new VxVM logical volume names
You must be sure that all applications and configuration files refer properly to the new
VxVM logical volumes. See “step 5. Planning for new VxVM logical volume names on
page 17” for details.
10. Restarting applications on the new VxVM volumes
Once the conversion to VxVM is complete, file systems can be mounted on the new
devices and applications can be restarted.
If you unmounted file systems before running vxvmconvert, you need to remount them
by the new volume names. vxvmconvert will have updated /etc/fstab with the new
names. When you started vxvmconvert, you may have left file systems mounted that
are associated with the volumes you converted. vxvmconvert remounts these with the
new VxVM volume names.
11. Tailoring your VxVM configuration
vxvmconvert provides a default name for naming the newly formed VxVM disk group
during conversion only as an option. However, you will be given the choice of choosing
your own VxVM disk group name. By default, vxvmconvert renames the LVM volume
group by replacing the prefix vg in the volume group name with the prefix dg. For
example, vg08 would become dg08. If there is no vg in the LVM volume group name,
vxvmconvert simply uses the same volume group name for its disk group.
The disks in the new VxVM disk group are given VxVM disk media names (see
vxintro(1M)) based on this disk group name. If your new VxVM disk group is dg08, it
will have VxVM disks with names like dg0801, dg0802, etc. The VxVM plexes within
the logical volumes will be dg0801-01, dg0801-02, etc.
If you do not like the default object names generated by the conversion, use the standard
VxVM utilities to rename these objects. See the rename option in the vxedit(1M) man
page for more details on renaming the disk groups.