topic Re: Unable to add new disk to one VG, but able to add to other VG in Operating System - HP-UX

Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 08:12:56 GMT

Hi,

There was a bad disk in our server. Vendor has replaced the bad disk. When i try to add the new disk to the existing VG. i'm getting i/o error 'n' the new disk is showing as stale in lvdisplay.

But the same disk i could able to add to other VG successfully.

Can anybody suggest me?

Thanks,
Madhu

Re: Unable to add new disk to one VG, but able to add to other VG

Stf — Tue, 07 Dec 2004 08:19:08 GMT

Hello,

Do a pvcreate -f on your new disk before adding it in the VG

could you send the exact error message please?

Stf ;-)

Re: Unable to add new disk to one VG, but able to add to other VG

RAC_1 — Tue, 07 Dec 2004 08:21:21 GMT

Shouldn't you add the disk to the VG it belonged to?? If it was not part of any VG, you can do pvcreate on it and add it to any VG you want. If disk belonged to a VG, after replacement, just do vgcfgrestore -n /dev/vgxx /dev/dsk/cxtxdx and do a vgsync

Anil

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 08:30:51 GMT

I tried all these options.

i'm trying to add to the same old VG. but i've removed the entry related to this bad disk before the hdd replacement.

i'm getting the below error when i try to extend LV.

#lvextend -m 1 /dev/vg02/u02
The newly allocated mirrors are now being synchronized. This operation will
take some time. Please wait ....
lvextend: Couldn't re-synchronize stale partitions of the logical volume: I/O error
lvextend: Couldn't resynchronize logical volume "/dev/vg02/u02".

Initially i suspected disk problem. But i could able to add the same disk to other VG successfully.

Any expert suggetions???

Re: Unable to add new disk to one VG, but able to add to other VG

Stf — Tue, 07 Dec 2004 08:36:41 GMT

What is the result of the command:

# lvdisplay -v /dev/vg02/u02

Stf

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 08:44:22 GMT

lvdisplay is showing stale partitions for fully.
other disk(mirror copy) is showing current.

Re: Unable to add new disk to one VG, but able to add to other VG

Stf — Tue, 07 Dec 2004 08:47:11 GMT

OK you have to do an

# lvreduce -m 0 /dev/vg02/u02
and then you can do an

# lvextend -m 1 /dev/vg02/u02

Stf ;-)

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 08:51:24 GMT

stf,

i tried all those options. looks like VG is corrupted.

Can you pls suggest me some high funda commands.

Re: Unable to add new disk to one VG, but able to add to other VG

Fred Ruffet — Tue, 07 Dec 2004 08:54:54 GMT

And what is output for pvdisplay on your new disk ?

Regards,

Fred

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 09:00:39 GMT

right now i've detached the problematic disk from mirror. i think it was showing that this disk was related to vg02 VG

Re: Unable to add new disk to one VG, but able to add to other VG

Stf — Tue, 07 Dec 2004 09:01:34 GMT

OK did your new disk have the same special files (/dev/dsk/cxtxdx) that the bad you have replaced?

If this is the case :

# vgcfgrestore -n /dev/vg02
# vgchange -a y /dev/vg02
# vgsync /dev/vg02

Stf ;-)

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 09:06:41 GMT

Mr.stf,

I told clearly that i tried all the basic things like these.

Can anybody suggest me regarding VG corruptions and recovry.

Re: Unable to add new disk to one VG, but able to add to other VG

RAC_1 — Tue, 07 Dec 2004 09:15:33 GMT

lvreduce -m 0 -k /dev/vgxx/u02 /dev/dsk/cxtxdx
The disk is the disk which is faulty and has been replaced by you.

If that succeeds, then do lvextend -m 1 /dev/vgxx/u02

Anil

Re: Unable to add new disk to one VG, but able to add to other VG

Stf — Tue, 07 Dec 2004 09:17:44 GMT

OK...

1. what is the path of your new disk that causes problem?

2. can you attach result of strings /etc/lvmtab?

3. can you attach result of strings /etc/lvmconf/vg02.conf?

Stf ;-)

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 09:20:33 GMT

I tried all these options. Looks like VG got corrupted. Any ideas about VG corruption and recovery?

Re: Unable to add new disk to one VG, but able to add to other VG

RAC_1 — Tue, 07 Dec 2004 09:35:07 GMT

MAdhu,

Dont jump to a conclusion. You have decided that the vg corrupted. That is what is causing the problem.
Be open, listen to what people say. Did you try my last post??? (Use of -k for lvreduce)

Anil

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 10:07:52 GMT

Dear Anil,

I used pvkey option very inititally, while removing the bad disk from the mirror, before the disk replacement.

The problem started like this.

disk was missing completely after the reboot. means ioscan was not showing the disk and the lvdisplay was showing this disk as stale. so, before calling vendor i removed this disk from LV. at that time i used -k option, as it was not showing the dev. file in lvdisplay. instead it was showing question mark ("???" ).

after lvreduce, i did vgreduce.

after the disk replacement i did following.

pccreate, vgextend and lvextend.

Re: Unable to add new disk to one VG, but able to add to other VG

RAC_1 — Tue, 07 Dec 2004 10:10:52 GMT

OK, what is status as of now?? Is the disk in vg??

Anil

Re: Unable to add new disk to one VG, but able to add to other VG

Madhu_17 — Tue, 07 Dec 2004 10:13:17 GMT

after adding to the existing vg, it was still showing stale. so, i tried adding the same disk to the other VG successfully to test the functionality of the disk.

here my question is, why i'm unable to add the disk to the old VG. but i'm able to add to the other VG.

Re: Unable to add new disk to one VG, but able to add to other VG

RAC_1 — Tue, 07 Dec 2004 10:15:47 GMT

Do a vgreduve -f /dev/vgxx (This will force to remove the PVs missing/has problems)

Now check /etc/lvmtab and vgdisplay -v output to check if disk is in vgxx or not. If not do a pvcreate on it anddo a vgextend.

Anil