topic Re: Unable to extract PVID/VGID from LVM disk in Operating System - HP-UX

Unable to extract PVID/VGID from LVM disk

Ra Jose — Mon, 19 Mar 2007 14:01:07 GMT

I added a disk to a VG (vg04). The disk is not assigned to any LVs. I did pvcreate, vgextend and then trying to check its PVID and VGID from the techniques I got from the forum.
# xd -j8200 -N16 -td /dev/dsk/c32t5d2
I get following
0000000 -1134413123 1174322453 0 0
0000010
I am wondering why I am getting this -ve (1134413123) and my 3rd and 4th fields are zero (which should have been my vgid). Can anyone shed light on what wrong I might have done or my checking is not right.

Below I have given another way -
# echo "0x2008?4D" | adb /dev/dsk/c32t5d2
2008: -1134413123 1174322453 0 0

Thank you all for your responses.
Rajos

Re: Unable to extract PVID/VGID from LVM disk

Patrick Wallek — Mon, 19 Mar 2007 14:04:24 GMT

Have you tried doing a 'vgdisplay -v vg04' to see what disks the VG things it has? If that indicates that the appropriate disks are there then I'm not sure what you gain by checking the PVID / VGID on the disk itself.

Re: Unable to extract PVID/VGID from LVM disk

Ra Jose — Mon, 19 Mar 2007 14:08:13 GMT

vgdisplay -v vg04 does show this disk and also it's alternate link. I want to make sure the vgid put on this disk is same as other disks in the VG. In this case, I have 4 other disks and all show same vgid. This disk does not show the same vgid after adding it to the VG( shows zero).
Rajos

Re: Unable to extract PVID/VGID from LVM disk

Court Campbell — Mon, 19 Mar 2007 14:14:34 GMT

Do a vgcfgbackup or a vgchange -a y on vg04. It looks like the vgra has not been updated. The kernel lvm structures and the disk lvm structures don't always get updated at the same time.

Re: Unable to extract PVID/VGID from LVM disk

Court Campbell — Mon, 19 Mar 2007 14:31:23 GMT

Also try this:

xd -An -j8200 -N16 -tx /dev/dsk/c32t5d2

Re: Unable to extract PVID/VGID from LVM disk

Ra Jose — Mon, 19 Mar 2007 14:48:08 GMT

Tried both what Campbell has suggested. No change. The vgid still does not show up.
Rajos

Re: Unable to extract PVID/VGID from LVM disk

Court Campbell — Mon, 19 Mar 2007 14:54:29 GMT

can you post the output from:

strings /etc/lvmtab

Re: Unable to extract PVID/VGID from LVM disk

James R. Ferguson — Mon, 19 Mar 2007 14:55:18 GMT

Hi:

I've used both techniques in the past. I prefer the first, since it doesn't rely on reading what the kernel thinks but rather what's written on the physical disk.

Make _sure_ that you have the proper device file. The 'vgid' of zero would suggest that the device does _not_ belong to a volume group.

Regards!

...JRF...

Re: Unable to extract PVID/VGID from LVM disk

Court Campbell — Mon, 19 Mar 2007 15:04:37 GMT

James and I are thinking the same thing.

Re: Unable to extract PVID/VGID from LVM disk

Tommy_6 — Mon, 19 Mar 2007 15:08:38 GMT

Have you tried using sam? Go into Disks and File Systems, then Volume Groups. View more information on the Volume group and see if everything looks alright. Hope this helps!

Re: Unable to extract PVID/VGID from LVM disk

Ra Jose — Mon, 19 Mar 2007 15:10:26 GMT

% > pvdisplay /dev/dsk/c24t4d2
--- Physical volumes ---
PV Name /dev/dsk/c32t5d2
PV Name /dev/dsk/c42t5d2 Alternate Link
VG Name /dev/vg04
PV Status available
Allocatable yes
VGDA 2
Cur LV 0
PE Size (Mbytes) 4
Total PE 2157
Free PE 2157
Allocated PE 0
Stale PE 0
IO Timeout (Seconds) 60
Autoswitch On

% > strings /etc/lvmtab

/dev/vg00
/dev/dsk/c2t0d0
/dev/dsk/c2t1d0
/dev/vg04
/dev/dsk/c32t3d0
/dev/dsk/c32t3d1
/dev/dsk/c32t3d2
/dev/dsk/c32t3d3
/dev/dsk/c42t3d0
/dev/dsk/c42t3d1
/dev/dsk/c42t3d2
/dev/dsk/c42t3d3
/dev/dsk/c32t5d2
/dev/dsk/c42t5d2

Re: Unable to extract PVID/VGID from LVM disk

Ra Jose — Mon, 19 Mar 2007 15:12:07 GMT

Sorry about it.
The pvdisplay out is for
% > pvdisplay /dev/dsk/c32t5d2
Rajos

Re: Unable to extract PVID/VGID from LVM disk

Ra Jose — Mon, 19 Mar 2007 15:30:28 GMT

Here is what I did to get the correct VGID.
% > pvchange -a n /dev/dsk/c32t5d2
% > pvchange -a n /dev/dsk/c42t5d2
% > vgcfgrestore -n vg04 /dev/rdsk/c32t5d2
% > pvchange -a y /dev/dsk/c32t5d2
% > pvchange -a y /dev/dsk/c42t5d2
% > xd -j8200 -N16 -td /dev/dsk/c32t5d2
0000000 -1134413123 1174322453 639308353 1047182634
0000010

Thank you all for your suggestions.
Rajos.