Veritas Volume Manager 5.0 Migration Guide, HP-UX 11i v3, First Edition, May 2008

Chapter

Converting LVM to VxVM

This chapter explains how to convert your LVM configuration to a VxVM

configuration and presents the following main topics:

■ Converting unused LVM physical volumes to VxVM disks

■ Converting LVM volume groups to VxVM disk groups

■ Restoring the LVM volume group configuration

■ Examples

The basic tools for conversion are the VxVM commands,

vxvmconvert and

vxdiskadm,

and the LVM administrative utilities such as pvremove and

vgcfgbackup. The discussion here details how to use these tools and gives some

insights into how these tools work.

The disks on your system managed by LVM can be of two types: LVM disks in

volume groups, and unused disks.

The former are disks that contain logical volumes and volume groups. Unused

disks contain no user data, and are not used by any volume group, but have LVM

disk headers written by

pvcreate. Conversion is done differently for these two

types of disks.

For unused LVM disks you can use a combination of pvremove and vxdiskadm.

For LVM disks in volume groups, the primary tool for conversion is the

vxvmconvert command. For information on vxdiskadm, see the man page

vxdiskadm(1M) or the Veritas Volume Manager Administrator’s Guide.

The

vxvxconvert utility is an interactive command. You can also use the

vxautoanalysis and vxautoconvert commands to perform non-interactive

analysis and conversion of LVM volume groups. The

vxautorollback command

also allows you to reverse the conversion, and turn a disk group back into a

volume group.

See “Non-interactive conversion of volume groups” on page 45.