Veritas Storage Foundation 5.1 SP1 Advanced Features Administrator"s Guide (5900-1503, April 2011)

■ Volume groups with mirrored volumes.
A conversion fails if the LVM volume group being converted has mirrored
volumes, but the system does not have a valid license installed that enables
mirroring for VxVM.
The analyze option in vxvmconvert, which is described in later sections, aids you
in identifying which volume groups can be converted.
Conversion process summary
Several steps are used to convert LVM volume groups to VxVM disk groups. Most
of these steps can be done with the vxvmconvert utility. All the steps are not
compulsory, and some may have to be followed only if there are problems during
conversion. Some of them (e.g. backing up user data) are left to you to accomplish
through your regular administrative processes.
The steps in the conversion process are:
■ Identifying LVM volume groups for conversion.
■ Analyzing an LVM group to see if conversion is possible.
■ Taking actions to make conversion possible if analysis fails.
■ Backing up your LVM configuration and user data.
■ Planning for new VxVM logical volume names.
■ Stopping application access to volumes in the volume group to be converted.
■ Converting a volume group.
■ Taking actions if conversion fails.
■ Implementing changes for new VxVM logical volume names
■ Restarting applications on the new VxVM volumes.
■ Tailoring your VxVM configuration.
These steps are described in detail in later sections of this chapter. Also available
are annotated examples on how to use vxvmconvert.
See “Examples” on page 417.
Additional information is available on restoring back to your original LVM
configuration.
See “Restoring the LVM volume group configuration” on page 414.
405Offline data migration
Converting LVM to VxVM