VERITAS Volume Manager 4.1 Migration Guide

Converting LVM to VxVM

Converting LVM Volume Groups to VxVM Disk Groups

Chapter 212

vxvmconvert will prompt for a name for the VxVM disk group that will be created to replace

the LVM volume group you are converting. This is the only object naming that is done through

vxvmconvert. For details on modifying VxVM volume names, see “11. Tailoring your VxVM

conﬁguration” on page 14 as described earlier in “2. Analyzing an LVM volume group to see if

conversion is possible” on page 9, the volume groups selected for conversion are analyzed to

ensure that conversion is possible. After a successful analysis phase, vxvmconvert will ask

you to commit to the change or abort the conversion. When you select to commit to conversion,

the new VxVM metadata is written.

NOTE It is good practice to convert one volume group at a time to avoid errors during

conversion.

The details of the conversion process are shown in “Examples” on page 20

8. Taking actions if conversion fails

Conversion can fail for any of the reasons detailed in the “Volume Group Conversion

Limitations” on page 5 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 77 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 “5. Planning for new VxVM logical volume names” on page 11 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.