topic Re: PV display problem in Operating System - HP-UX

PV display problem

Sunny Jaisinghani — Tue, 30 Oct 2007 10:13:26 GMT

hello all,

when trying to pvdisplay a physical volume i get following error

pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c2t0d0":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query all of the physical volumes.
pvdisplay: Couldn't retrieve the names of the physical volumes
belonging to volume group "/dev/vg00".
pvdisplay: Cannot display physical volume "/dev/dsk/c2t0d0"

i tried diskinfo it says: no such device or address

also the device file for this PV is present. both the charachter and block device files.

when trying ioscan -fnC disk it gives no output.

Can anyone tell me what is the prob with the PV

Regards
Sunny

Re: PV display problem

Wim Rombauts — Tue, 30 Oct 2007 10:16:54 GMT

The disk just isn't there, or is not responding at all.
The disk is probably dead, replace it.

Or a serious configuration change has been done on your system, causing the IO-map to be rewritten.

Re: PV display problem

Torsten. — Tue, 30 Oct 2007 10:19:06 GMT

It's gone?

If you boot the server after a disk died, you cannot see this disk in ioscan - there is no NO-HW entry.

Check

# strings /etc/lvmtab
and
# vgdisplay -v vg00

Re: PV display problem

David Bellamy — Tue, 30 Oct 2007 10:20:08 GMT

The disk is probably dead. Do a string /etc/lvmtab and see what drives vg00 is suppose to contain.

Re: PV display problem

Wim Rombauts — Tue, 30 Oct 2007 10:32:33 GMT

Just an additional thought ... If you say "ioscan -fnC disk" returns no output, that means your system has no disks.
If that is so, where has your system booted from ???

Re: PV display problem

Sunny Jaisinghani — Tue, 30 Oct 2007 10:41:15 GMT

/etc/lvmtab shows the entry of the disk

this disk is a mirror copy of /dev/dsk/c1t0d0

and both these disks are used for secondary swap...

Does this info help

Re: PV display problem

Wim Rombauts — Tue, 30 Oct 2007 10:44:53 GMT

Then your disk /dev/dsk/c2t0d0 is dead.

I only hope "ioscan -fnC disk" still returns /dev/dsk/c1t0d0 ?

Re: PV display problem

Sunny Jaisinghani — Tue, 30 Oct 2007 10:45:12 GMT

this is the output of lvdisplay of the LV which uses these disks c2t0d0 and c1t0d0

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c1t0d0 1024 1024

--- Logical extents ---
LE PV1 PE1 Status 1 PV2 PE2 Status 2
00000 ??? 00000 stale /dev/dsk/c1t0d0 00000 current
00001 ??? 00001 stale /dev/dsk/c1t0d0 00001 current
00002 ??? 00002 stale /dev/dsk/c1t0d0 00002 current
00003 ??? 00003 stale /dev/dsk/c1t0d0 00003 current
00004 ??? 00004 stale /dev/dsk/c1t0d0 00004 current

Re: PV display problem

David Bellamy — Tue, 30 Oct 2007 10:47:23 GMT

Sunny your disk is dead, replace the disk.

Re: PV display problem

Sunny Jaisinghani — Tue, 30 Oct 2007 10:48:01 GMT

ioscan shows c1t0d0

root@xxxxx:/etc/lvmconf# ioscan -fnC disk /dev/dsk/c1t0d0
Class I H/W Path Driver S/W State H/W Type Description
=====================================================================
disk 0 0/0/1/1.0.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c1t0d0 /dev/rdsk/c1t0d0

Re: PV display problem

Sunny Jaisinghani — Tue, 30 Oct 2007 10:52:56 GMT

how do i solve this problem...

i replace the disk

then what do i do.. since it is used for secondary swap

Re: PV display problem

Torsten. — Tue, 30 Oct 2007 10:55:03 GMT

The use of this disk doesn't matter because it is mirrored.

Replace the disk, restore the LVM config and sync.

Read
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf