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

21Converting LVM to VxVM
Converting LVM volume groups to VxVM disk groups
Conversion steps explained
1. Identifying LVM disks and volume groups for conversion
The obvious first step in the conversion process is to identify what you want to
convert. The native LVM administrative utilities like
vgdisplay and SMH can
help you identify candidate LVM volume groups as well as the disks that
comprise them.
You can also use the
vxvmconvert and vxdisk commands to examine groups and
their member disks. The information presented through the
vxvmconvert and
vxdisk utilities and their interpretation is shown in “Examples” on page 32.
You can also list the LVM disks with the following VxVM command:
# vxdisk list
2. Analyzing an LVM volume group to see if conversion is
possible
After you have selected a volume group for conversion, you need to analyze it to
determine if conversion for VxVM use is possible.
Use the analyze option of vxvmconvert to check for problems that would
prevent the conversion from completing successfully. This option checks for all
the conditions listed in “Volume group conversion limitations” on page 18.
The analysis calculates the space required to add the volume group disks to a
VxVM disk group, and to replace any existing disks and volumes with VxVM
volumes, plexes, and subdisks. If you don’t have the required space to convert
the disks, the conversion would fail.
Analysis can be run on a live system while users are accessing their data. To
analyze LVM volume groups, choose option 1 of the
vxvmconvert utility.