topic Re: vgscan in Operating System - HP-UX

vgscan

Daniel Caçador — Thu, 30 Mar 2006 07:43:37 GMT

Hi!

Look this message after I execute the vgscan -v:

vgscan: couldn't access the list of physical volumes for volume group "/dev/vg00".

The volume group /dev/vg00/group was not matched any Physical volumes complete.

Thank's!!!

Re: vgscan

Fabio Ettore — Thu, 30 Mar 2006 07:50:53 GMT

Hi Daniel,

can you post the output of

ll /dev/vg00/group

Does vgdisplay on vg00 get error messages as well?
Have you backupped /etc/lvmtab before to launch vgscan?

Regards,
Fabio

Re: vgscan

Peter Godron — Thu, 30 Mar 2006 07:57:20 GMT

Daniel,
why did run the vgscan command? First paragraph of man vgscan says to "in the event of a catastrophic error".

Have you got a backup of your /etc/lvmtab.
Seems the system thinks you have a vg00 without actual physical disks!

Did you have a diskcrash?

Re: vgscan

Sivakumar TS — Thu, 30 Mar 2006 08:04:33 GMT

Hi,

what is the content of lvmtab now?

Try to mv the /etc/lvmtab and run vgscan

Regards,

Siva.

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 08:17:18 GMT

Hi!!

This is the shoot of vgscan.

Thank's

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 08:22:32 GMT

This is the shot of ls /dev/vg00/group

Thank's!

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 08:23:28 GMT

This is the shot of ls /dev/vg00/group

Thank's!

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 08:27:30 GMT

Do check for /dev/lvmconf/vg00.conf and if some older files and also decide on which disks should be in vg00.
Make sure those are the disks which should belong to VG00.. And then take other steps..

Prashant

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 08:31:53 GMT

Yes, have the files, how the others steps?

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 08:50:30 GMT

You can list the disks which were in use like following..

vgcfgrestore -n vg_staging_tmp -l
Volume Group Configuration information in "/etc/lvmconf/vg_staging_tmp.conf"
VG Name /dev/vg_staging_tmp
---- Physical volumes : 4 ----
/dev/rdsk/c22t9d4 (Non-bootable)
/dev/rdsk/c23t9d4 (Non-bootable)
/dev/rdsk/c22t9d5 (Non-bootable)
/dev/rdsk/c23t9d5 (Non-bootable)

You can also use same command like below:

vgcfgrestore -f /etc/lvmconf/vg_staging_tmp.conf.old -l
Volume Group Configuration information in "/etc/lvmconf/vg_staging_tmp.conf.old"
VG Name /dev/vg_staging_tmp
---- Physical volumes : 4 ----
/dev/rdsk/c22t9d4 (Non-bootable)
/dev/rdsk/c23t9d4 (Non-bootable)
/dev/rdsk/c22t9d5 (Non-bootable)
/dev/rdsk/c23t9d5 (Non-bootable)

Decide with your best judgement what disks were in use for VG00..

Then check lvmtab, if it is messed up..

Recreate lvmtab & check after that..

Whatever you do have all config backup first..

/etc/lvmconf/vg00* (backup to safe place)
/etc/lvmtab - back up

Gud luck
Prashant

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 09:23:27 GMT

Hi Prashant!

Sorry, but I did not understand what you he said.

Please, he tries to explain me again?

Thank's!

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 10:59:05 GMT

You have to run command as I explained in my example.. on vg00.conf & vg00.conf.old.. it will show output as disks which belong to VG00 as per previous config..
Make judgement and then recreate lvmtab ..
Thanks
Prashant

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 11:46:03 GMT

OK. See the shoot of command...

And now?

Thank's!!!

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 11:57:57 GMT

Now see this shot.
Why I can't mount the lvols?

Thank's!

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 12:05:48 GMT

Can you check /dev/vg00/* ... Are the lvol device files existing?

Regards
Prashant

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 12:21:33 GMT

OK
Look the shot

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 12:34:11 GMT

DO ls -al

& vgdisplay -v vg00

& pvdisplay -v /dev/dsk/c1t8d0 ...

Thanks and regards
Prashant

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 12:34:56 GMT

also try running vgchange -a y vg00

Thx
Prashant

Re: vgscan

Daniel Caçador — Thu, 30 Mar 2006 12:41:52 GMT

Error....

Thank's!

Re: vgscan

Prashant Zanwar_4 — Thu, 30 Mar 2006 12:51:44 GMT

vgcfgrestore -n /dev/vg00 -l

What does this show? is it same as

vgcfgrestore -f /etc/lvmconf/vg00.conf.old -l

if So, you have to boot system in maintainence mode, do

vgcfgrestore -f /tmp/vg00.conf /dev/rdsk/c1t8d0 , i am not sure of way of doing it in multiuser mode..
My assumption is you have lost lvm structure stored on disk..

You might wait for other replies, if some one has any better idea..

Good luck
Thanks and regards
Prashant