topic BCV - Volume group not able to create !!! in Operating System - HP-UX

BCV - Volume group not able to create !!!

Whitehorse_1 — Tue, 10 Jul 2007 09:51:08 GMT

Hi Admins,,

Please bear with this fishy question..

I ran BCV for a DB server, and when it try mounting to dest. server, I get following error:

"Volume group /dev/vgdbaxy could not be created", and successive LV errors. Can someone throw light on this..

I could find device files/group file for the VG in place...

--WH

Re: BCV - Volume group not able to create !!!

Todd McDaniel_1 — Tue, 10 Jul 2007 10:23:51 GMT

I seem to remember you need to vgexport -p and reimport the vgs on the destination server?

Re: BCV - Volume group not able to create !!!

Whitehorse_1 — Tue, 10 Jul 2007 12:47:26 GMT

VG is not present in lvmtab.. no qn of vgexport. Im failing in "vgimport" part of BCV.

Bit surprised, I could run,

vgimport -s -m vgdataxyz.map vgdataxyz

I couldnt run (actually runs by BCV)
vgimport -m /var/tmp/vgdataxyz
.mapfile -v /dev/vgdataxyz..

-- WH

Re: BCV - Volume group not able to create !!!

Todd McDaniel_1 — Tue, 10 Jul 2007 13:32:00 GMT

hmmm... sorry for these elementary questions.

Did you break the bcv mirror on the source box?

What steps did you take before you attempted to create/mount the BCVS on your dest server?

Re: BCV - Volume group not able to create !!!

skt_skt — Tue, 10 Jul 2007 21:57:00 GMT

split the bcv
mkdir
mknod(make sure the minor number belongs to a number whose decimal value is lesser than kernel parm maxvgs)
vgchgid (if the BCV reside on the same host as source0
vgimport -p
vgimport
activate
mount

Re: BCV - Volume group not able to create !!!

gstonian — Wed, 11 Jul 2007 04:40:04 GMT

Here's what we do

Create snapshot
ioscan
mkdir /dev/nn
mknod /dev/nn/group...
vgchgid /dev/rdsk/c... /dev/rdsk/c...
vgimport /dev/rdsk/c... /dev/rdsk/c...
vgchange -a y /dev/nn
vgcfgbackup /dev/nn
fsck -F vxfs /dev/nn/lvoln
mount /dev/nn/lvoln /mount/fs

Re: BCV - Volume group not able to create !!!

David Child_1 — Wed, 11 Jul 2007 07:39:45 GMT

Can you verify that the maxvgs kernel parameter is set to handle the number of volume groups?

kctune -q maxvgs (for 11.23)
kmtune -q maxvgs (for 11.00/11.11)

Then compare this with the number of volume groups defined on the system;

vgdisplay | grep "VG Name" | wc -l
(or)
ls /dev/*/group | wc -l

David