When Good Disks Go Bad: Dealing with Disk Failures Under LVM (5900-3153, June 2013)

vgdisplay

vgdisplay: Couldn't query volume group "/dev/vg00".

Possible error in the Volume Group minor number;

Please check and make sure the group minor number is unique.

vgdisplay: Cannot display volume group "/dev/vg00".

Cause:

This error has several possible causes:

a. There are multiple LVM group files with the same minor number.

b. Serviceguard was previously installed on the system, and the /dev/slvmvg device

file still exists.

Recommended Action:

a. List the LVM group files. If there are any duplicate minor numbers, export one of the

affected volume groups, create a new group file with a unique minor number, and re-

import the volume group. If you are not familiar with the following process, contact

your HP support representative for assistance:

# ll /dev/*/group

# vgexport -m vgname.map -v -f vgname.file /dev/vgname

# mkdir /dev/vgname

# mknod /dev/vgname/group c 64 unique_minor_number

# vgimport -m vgname.map -v -f vgname.file /dev/vgname

b. Remove the /dev/slvmvg device file and recreate the /etc/lvmtab file with the

following commands:

# rm /dev/slvmvg

# mv /etc/lvmtab /etc/lvmtab.old

# vgscan –v

Warning: couldn't query physical volume "pvname":

The specified path does not correspond to physical volume attached to

this volume group

Warning: couldn't query all of the physical volumes.

Cause:

This error has several possible causes. They are described earlier under the vgchange

error messages.

Recommended Action:

See the recommended actions under the vgchange error messages.

vgextend

vgextend: Not enough physical extents per physical volume.

Need: #, Have: #.

Cause:

The disk size exceeds the volume group maximum disk size. This limitation is defined

when the volume group is created, as a product of the extent size specified with the –s

option of vgcreate and the maximum number of physical extents per disk specified with

the –e option. Typically, the disk is successfully added to the volume group, but all of it is

not accessible.