Seagate ST34572WC Specifications download pdf (Page 32)

Detach the physical volume or deactivate the volume group before attempting to restore the physical

volume. If there is reason to believe that the data on the disk is corrupted, the disk can be detached

and marked using vgcfgrestore then attached again without replacing the disk. This causes LVM

to reinitialize the disk and synchronize any mirrored user data mapped there.

vgchange

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:

a. The disk was missing when the volume group was activated, but was later restored. This typically

occurs when a system is rebooted or the volume group is activated with a disk missing, uncabled,

or powered down.

b. The disk LVM header was overwritten with the wrong volume group information. If the disk is

shared between two systems, it is likely that one of the systems was not aware that the disk was

already in a volume group. To confirm, check the volume group information using the

dump_lvmtab command, available from your HP support representative, and look for

inconsistencies. For example:

# dump_lvmtab -s | more

SYSTEM : 0x35c8cf58

TIME : 0x3f9acc69 : Sat Oct 25 15:18:01 2003

FILE : /etc/lvmtab

HEADER : version:0x03e8 vgnum:7

VG[00] VGID:35c8cf58 3dd13164 (@0x00040c) pvnum:2 state:0 /dev/vg00

(00) VGID:35c8cf58 3dd13164 PVID:35c8cf58 3dd13164 /dev/dsk/c0t6d0

(01) VGID:35c8cf58 3dd13164 PVID:35c8cf58 3dda4694 /dev/dsk/c4t6d0

VG[01] VGID:065f303f 3e63f01a (@0x001032) pvnum:92 state:0 /dev/vg01

(00) !VGID:35c8cf58 3f8df316 PVID:065f303f 3e63effa /dev/dsk/c40t0d0

(01) !VGID:35c8cf58 3f8df316 PVID:065f303f 3e63effe /dev/dsk/c40t0d4

(02) !VGID:35c8cf58 3f8df316 PVID:065f303f 3e63f003 /dev/dsk/c40t1d0

…

In this example, note that the volume group ids (VGID) for the disks in /dev/vg01 are not

consistent; inconsistencies are marked !VGID.

Recommended Action:

a. Use ioscan and diskinfo to confirm that the disk is functioning properly. Re-activate the

volume group using the following command:

# vgchange –a y vgname

b. There are several methods of recovery from this error. If you are not familiar with the commands

outlined in the following procedures, contact your HP support representative for assistance.

1) Restore a known good configuration to the disks using vgcfgrestore. Be sure to use a

valid copy dated before the first occurrence of the problem.

# vgcfgrestore –n vgname pvname

2) Recreate the volume group and its logical volumes, restoring the data from the most

current backup.

3) Export and re-import the volume group using the following commands:

# 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

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Seagate ST34572WC Specifications Page 32

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