topic Re: LVM error in Operating System - HP-UX

LVM error

Filosofo — Tue, 29 Apr 2003 12:06:16 GMT

Hello
when I execute vgdisplay -v /dev/vg_sv I see:

vgdisplay: Cannot open the control file "/dev/vg_sv/group":
No such device
vgdisplay: Cannot display volume group "vg_sv".

This is output of ll /dev/vg_sv
total 0
crw-rw-rw- 1 root sys 64 0x0e0000 Apr 29 10:01 group
brw-r----- 1 root sys 64 0x0e0001 Apr 29 10:06 lv_sv
brw-r----- 1 root sys 64 0x0e0002 Apr 29 10:08 lv_sv_app
crw-r----- 1 root sys 64 0x0e0001 Apr 29 10:06 rlv_sv
crw-r----- 1 root sys 64 0x0e0002 Apr 29 10:08 rlv_sv_app

Please help

Filo

Re: LVM error

Rita C Workman — Tue, 29 Apr 2003 12:13:34 GMT

Is the vg active??

vgchange -a y /dev/vg

Is it/or was it part of any MC/SG package?

vgchange -c n /dev/vg
vgchange -a y /dev/vg

Just a quick thought to try,
Rita

Re: LVM error

Ravi_8 — Tue, 29 Apr 2003 12:14:03 GMT

Hi,

Looks like corrupted lvmtab file

#mv /etc/lvmtab /etc/lbmtab.old
#vgscan -a -v
#vgdisplay -v /dev/vg_sv

Re: LVM error

Balaji N — Tue, 29 Apr 2003 12:16:09 GMT

hi
by any chance lvmtab is corrupted.

1. vgchange -a y vgname.

2. mv /etc/lvmtab /etc/lvmtab.oriug.

3. vgscan -a -v -p (preview)

4. vgscan -a -v (recreate lvmtab)

hth
-balaji

Re: LVM error

Filosofo — Tue, 29 Apr 2003 12:18:25 GMT

gscan: has no correspoding valid raw device file under /dev/rdsk.
Verification of unique LVM disk id on each disk in the volume group
/dev/vg_sv failed.
Following Physical Volumes belong to one Volume Group.
Unable to match these Physical Volumes to a Volume Group.
Use the vgimport command to complete the process.
/dev/dsk/c6t2d0
/dev/dsk/c8t2d0

Following Physical Volumes belong to one Volume Group.
Unable to match these Physical Volumes to a Volume Group.
Use the vgimport command to complete the process.
/dev/dsk/c6t4d0
/dev/dsk/c8t4d0

Re: LVM error

John Poff — Tue, 29 Apr 2003 12:21:28 GMT

Hi,

Your group file looks fine for that VG. Maybe you have a duplicate minor number for a group file on another VG? Try this:

ls -l /dev/*/group | sort -k6

and you should get a sorted list of all your group files. See if any have the same minor numbers.

JP

Re: LVM error

lanke_1 — Tue, 29 Apr 2003 12:22:00 GMT

Hi Filo,

What kind of storage do you have i..e is it an internal or external disk.

How many volume groups are there on this particular disk
device.

Are you able to mount the File systems with logical volumes on this vg_sv.

Thanks,
Lanke

Re: LVM error

Cheryl Griffin — Tue, 29 Apr 2003 12:22:44 GMT

What is your maxvgs set to?
# sysdef |grep maxvgs

Could it be that the maxvgs is set to low and this group 0x0e exceeds that value? 0x0e would be 15 (if I am counting correctly).
# ll /dev/vg* |grep group |wc -l
# ll /dev/vg*|grep group

Re: LVM error

Bill McNAMARA_1 — Tue, 29 Apr 2003 12:22:53 GMT

strings /etc/lvmtab before vgscanning.
you can vgimport if the activation doesn't work.

the vgscan can screw up all alternate path 'load balancing' that may have been configured. If you don't know what a pvlink is then the vgscan possibly won't screw this up, unless of course you didn't create the lvm conf!

Later,
Bill

Re: LVM error

lanke_1 — Tue, 29 Apr 2003 12:33:01 GMT

I'm sure that same minor number has been used for two
group files.

If you have the map file,
I would suggest you do the
vgexport and vgimport process
again to create vg_sv.

Thanks,
Lanke

Re: LVM error

omars — Wed, 30 Apr 2003 07:44:51 GMT

Hi ,

a.) I assume your /dev/vg_sv
files are okay .
If not execute
mknod /dev/vg_sv/group c 64 0x0e0000
mknod /dev/vg_sv/lv_sv c 64 0x0e0001
mknod /dev/vg_sv/lv_sv_app c 64 0x0e0002
mknod /dev/vg_sv/rlv_sv c 64 0x0e0001
mknod /dev/vg_sv/rlv_sv_app c 64 0x0e0002

b.) Next do
vgdisplay /dev/vg_sv
If u get errors , then proceed to step c

b.) sam --> kernel configuration-->Configurable parameters

select "maxvgs" and set to 15
and modify Kernel .
System will automatically reboot

d.)Once system is up & running , then do
vgscan -v ( recreate -lvmtab )

e.) Now u can do
vgchange -a y /dev/vg_sv

f.)mount -a
This will mount your lvols .

Re: LVM error

V. V. Ravi Kumar_1 — Wed, 30 Apr 2003 08:01:55 GMT

Hi,
I think this is the problem of having duplicate minor numbers for group files. run
ll /dev/*/group
this show group files for all VG's, check for any duplication and change it.
delete present group file and create a new one with different minor number

mknod /dev/vg_sv/group c 64 0x0006

Regards

Re: LVM error

omars — Wed, 30 Apr 2003 08:18:01 GMT

Hi Ravi ,

Using a unique group device will
not help at all because the physical volumes in "vg_sv" have PVRA & VGRA
areas which indicates the mapping
of 0x0e0000

rgds