VERITAS Volume Manager 3.2 for HP-UX Release Notes

Preparing to Install the VERITAS Volume Manager for HP-UX on a System with LVM Volume Groups

Chapter 1 43

CAUTION You will lose access to any data on these disks by doing these steps.

a. Use lvremove to remove any LVM volumes using the disk. For example:

# umount /lvmvol

# lvremove /dev/vg01/lvmvol

b. Use vgreduce to remove the disk from any LVM volume groups to which it

belongs. For example:

# vgreduce /dev/vg01 /dev/dsk/c0t6d0

c. If the disk to be removed is the last disk in the volume group, use vgremove to

remove the volume group. For example

# vgremove /dev/vg01

d. Use pvremove to erase the LVM disk headers. For example:

# pvremove /dev/rdsk/c0t6d0

e. pvremove will not remove 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 /dev/rdsk/c0t6d0

f. If pvdisplay finds no valid group information associated with the disk, you can

overwrite the LVM headers using pvcreate:

# pvcreate /dev/rdsk/c0t6d0

CAUTION If /dev/rdsk/c0t6d0 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 lvmtab and the LVM headers indicate it is

not a member of any volume group. (That is, it has been

pvcreated but not been an argument for vgcreate or vgextend.)

g. After running pvcreate, then use pvremove to erase all vestiges of LVM disk