VERITAS Volume Manager 5.0 Migration Guide (September 2006)

16 Converting LVM to VxVM
Converting unused LVM physical volumes to VxVM disks
Converting unused LVM physical volumes to VxVM
disks
LVM disks which are not part of any volume group, and contain no user data, are simply
cleaned up, so that there are no LVM disk headers. Then the disks are given over to
VxVM through the normal means of initializing disks.
Caution: Exercise caution while using this procedure to give disks over to VxVM. You
must be absolutely certain that the disks are not in use in any LVM configuration. If there
is any user data on these disks, it will be lost during conversion.
Removing LVM disk information
To remove LVM disk information from the disks use the following command:
# pvremove disk_name
The pvremove command will not allow the removal of disk headers which indicate a
Volume Group membership for the disk. If the disk fails
pvremove for this reason, you
should first make certain that the group membership information is stale. Do this by using
pvdisplay:
# pvdisplay disk_name
If pvdisplay finds no valid group information associated with the disk, you can
overwrite the LVM headers using
pvcreate:
# pvcreate disk_name
Caution: If disk_name is an alternate path to a disk that does not appear in the lvmtab
file for this system, or is a disk that is in use on another system, but not imported onto this
system, then do not
pvcreate -f the disk. Doing so will destroy the LVM headers. You
can use
pvcreate without the -f option safely, as it will only succeed if the disk is not
listed in the /etc/lvmtab file, and if the LVM headers indicate that it is not a member
of any volume group. (That is, it has been
pvcreated but not been an argument for
vgcreate or vgextend.)