topic Re: Vgscan in Operating System - HP-UX

Vgscan

Bruno Misculin Rosamili — Thu, 23 May 2002 14:43:01 GMT

Ciao,
I have a problem with a L class whith HP-UX 11.00.
After saving /etc/lvmtab I made a vgscan and after that in the new lvmtab I had /dev instead of /dev/vg00.
It happens every time.
Somebody can help me?
Ciao
Federico

Re: Vgscan

PIYUSH D. PATEL — Thu, 23 May 2002 14:48:02 GMT

Hi Bruno,

Apart from /dev are you getting /dev/vg00 also and the disks which are included in the volume group.

What problem are you facing......why are you doing a vgscan ???

Piyush

Re: Vgscan

James R. Ferguson — Thu, 23 May 2002 14:48:40 GMT

Hi:

One thing is to make sure that you move aside the current 'lvmtab' before doing the 'vgscan'. Otherwise it will be used to in building the new one.

Try this:

# mv /etc/lvmtab /etc/lvmtab.old
# vgscan -av

Regards!

...JRF...

Re: Vgscan

Jeff Schussele — Thu, 23 May 2002 14:49:32 GMT

Hi Bruno,

Are you removing the original lvmtab by mv or copy/rm or just making a safe copy?
You should make sure it doesn't exist prior to the vgscan command or it'll use the lvmtab as reference.

Rgds,
Jeff

Re: Vgscan

Helen French — Thu, 23 May 2002 14:49:48 GMT

Hi Bruno:

May be this latest patch - PHCO_24645 (s700_800 11.00 LVM commands cumulative patch) will solve your problem.

HTH,
Shiju

Re: Vgscan

S.K. Chan — Thu, 23 May 2002 14:52:56 GMT

2 possibilities ..
1) Move the lvmtab file first
# cd /etc
# mv lvmtab lvmtab.org
# vgscan -v
2) /dev/slvmvg file problem (if it exists you..)
# cd /etc
# rm /dev/slvmvg
# mv lvmtab lvmtab.org
# vgscan -v

Re: Vgscan

erics_1 — Thu, 23 May 2002 14:53:53 GMT

Federico,

Take a look within your /dev directory for a file that was mknod'ed the same as the /dev/vg00/group file. If there is, this file needs to be moved elsewhere.

Hope this helps!

Eric

Re: Vgscan

MANOJ SRIVASTAVA — Thu, 23 May 2002 14:57:40 GMT

Bruno

form the patch no PHCO_25814 :details

( SR:8606166168 CR:JAGad35455 )
The vgscan command puts a bogus entry in the lvmtab
file, when a special file /dev/slvmvg is present
with the same minor number as /dev/vg00.

May be you need to look in this direction.

Manoj Srivastava

Re: Vgscan

Bruno Misculin Rosamili — Thu, 23 May 2002 15:09:37 GMT

Ciao,
my problem was that I had a disk that doesen't work. On this disk I had vg01 ( the system had to be in cluster mode ) but unfortunately when I try to change disk with a new one it was not possible to remove/reduce vg01 because vg01 was not active ( vgchange command doesent't work because disk was not ok ).
So I try with vgscan and it was ok but /dev/vg00 appears as /dev in lvmtab
I resolve my problem with vgexport vg01 but I would like to know how to solve the problem regarding vg00 mistake doing vgscan.

P:S. I made a mv to save lvmtab
Sorry for my bad English!
Ciao Federico

Re: Vgscan

S.K. Chan — Thu, 23 May 2002 15:12:39 GMT

Did you try option 2 (from my previous post), only if /dev/slvmvg exists ?