topic Re: Problem with LVM in Operating System - HP-UX

Problem with LVM

Daniel Duarte — Thu, 07 Apr 2005 15:06:29 GMT

All

I have a problem to include the disk in VG00.

# vgextend /dev/vg00 /dev/dsk/c3t6d0
Volume group "/dev/vg00" has been successfully extended.
Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
vgcfgbackup: /etc/lvmtab is out of date with the running kernel:Kernel indicates 9 disks for "/dev/vg00"; /etc/lvmtab has 8 disks.
Cannot proceed with backup.

Someone can help-me ?

Thanks

Re: Problem with LVM

Jeff Schussele — Thu, 07 Apr 2005 15:47:41 GMT

Hi Daniel,

The problem, I suspect, is in the lvmtab file itself.
Move it out of /etc and run
vgscan -av

Make sure it is no longer in /etc or the vgscan command will reference it while working.

HTH,
Jeff

Re: Problem with LVM

Uday_S_Ankolekar — Thu, 07 Apr 2005 15:50:20 GMT

I guess you have corrupted lvmtab. Move current lvmtab from /etc and run vgscan -av to recreate new lvmtab.

-USA..

Re: Problem with LVM

HGN — Thu, 07 Apr 2005 16:00:35 GMT

Hi

This looks like a corrupted lvmtab file,it is better to move to a differnt name and run vgscan -av which will create it back like other mentioned here.

Rgds

HGN

Re: Problem with LVM

Daniel Duarte — Thu, 07 Apr 2005 16:09:29 GMT

Create lvmtab wich VGSCAN -AV

Following the command bellow

[/] # lvlnboot -R
Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
vgcfgbackup: /etc/lvmtab is out of date with the running kernel:Kernel indicates 9 disks for "/dev/vg00"; /etc/lvmtab has 8 disks.
Cannot proceed with backup.
[/] # lvlnboot -v
lvlnboot: Warning: Can not determine all Physical Volumes on which mirrored copies of
the Logical Volume are located. "/etc/lvmtab" is missing Physical Volumes.
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c3t3d0 (10/0.3.0)
/dev/dsk/c3t4d0 (10/0.4.0)
/dev/dsk/c3t5d0 (10/0.5.0)
/dev/dsk/c3t6d0 (10/0.6.0) -- Boot Disk
/dev/dsk/c4t3d0 (10/8.3.0)
/dev/dsk/c4t4d0 (10/8.4.0) -- Boot Disk
/dev/dsk/c4t5d0 (10/8.5.0)
/dev/dsk/c4t6d0 (10/8.6.0)
Boot: lvol1 on: /dev/dsk/c4t4d0
Root: lvol3 on: /dev/dsk/c4t4d0
Swap: lvol2 on: /dev/dsk/c4t4d0
Dump: lvol7 on: /dev/dsk/c3t5d0, 0

Re: Problem with LVM

Daniel Duarte — Thu, 07 Apr 2005 16:11:14 GMT

The problem, I have 8 disks and no 9 disks.

Re: Problem with LVM

Florian Heigl (new acc) — Thu, 07 Apr 2005 20:17:48 GMT

If the number of disks is verified to be 8 - that means You're dead sure that all disks that ought to be available are available, then the command vgreduce -f /dev/vg00 will solve this issue. (the kernel will be told to listen to /etc/lvmtab, not to the voices in his head)

please first do
strings /etc/lvmtab and check through the list of disks, there's no easy turning back.

Re: Problem with LVM

Dietmar Konermann — Fri, 08 Apr 2005 02:01:36 GMT

Daniel,

the kernel thinks the VG has 9 PVs, but your lvmtab only contains 8. Normally vgreduduce -f vg00 should resolve this, UNLESS there are still extents allocated from the "phantom" PV.

Pls check with lvdisplay -v all your LVs and look if there are any "???" LEs listed. If this is the case then you would need to reduce them from the lvol to free these extents (using -k option).

Best regards...
Dietmar.

Re: Problem with LVM

T G Manikandan — Fri, 08 Apr 2005 02:18:42 GMT

check this doc

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000076088072