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

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 command and the vxdisk command to examine
groups and their member disks. The information presented through the
vxvmconvert command and the vxdisk command and their interpretation are
available.
See “Examples” on page 417.
You can also list the LVM disks with the following VxVM command:
# vxdisk list
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. Additional information is available
on all the conditions that this option checks for.
See “Volume group conversion limitations” on page 403.
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.
Offline data migration
Converting LVM to VxVM
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