topic Re: Problem with mounting logical volume in Operating System - HP-UX

Problem with mounting logical volume

Rajshree Shinde — Mon, 10 Jun 2002 14:06:40 GMT

I have a setup as follows.
Volume group-vg09
Logical volumes-lvol1, lvol2
After a reboot I am not able to query lvol1.
I can not mount also, it says read of super block on /dev/vg09/lvol1 failed.

If I do fsck it sayd can not stat /dev/rdsk/lvol1

lssf for lvol2-lssf /dev/dsk/c5t5d3 is OK,
But lssf /dev/dsk/c5t3d7 gives ??? at hardware address.

I am also not able to do mksf as I do not get /dev/dsk/c5t3d7 in ioscan -fnCdisk.

lvdisplay gives error that could not query /dev/dsk/c5t3d7

I had some data on that. How do I recover? I need that data desperately.

Thanks in advance.

Re: Problem with mounting logical volume

Shahul — Mon, 10 Jun 2002 14:10:02 GMT

Hi

If U are not able to see in #iosvan -fnC disk

Then something is wrong with HDD. Please report to H/W vendor.

Best of luck
Shahul

Re: Problem with mounting logical volume

Sanjay_6 — Mon, 10 Jun 2002 14:10:38 GMT

Hi,

This look like a repeat of your earlier post. Doesn't seem like you could do anything .

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xb974107d277ad611abdb0090277a778c,00.html

Regards
Sanjay

Re: Problem with mounting logical volume

PIYUSH D. PATEL — Mon, 10 Jun 2002 14:48:13 GMT

Hi,

try

# insf -c disk -e

to create a device file again and then try.

Could be a problem with disk....any other errors in syslog.log regarding this disk.

Piyush

Re: Problem with mounting logical volume

PC_7 — Tue, 11 Jun 2002 00:29:21 GMT

Hi,

From your message, I'm assuming that vg09 consists of 2 disks: /dev/dsk/c5t5d3 and /dev/dsk/c5t3d7, and "lvdisplay -v" 's output would have /dev/vg09/lvol1 occupying /dev/dsk/c5t3d7.

If you do not see /dev/dsk/c5t3d7 from "ioscan -nfC disk" output, meaning that system can't find it after scanning. This typically refers to hardware problem.

LV level won't be able to query /dev/dsk/c5t3d7 if ioscan can't find it.

I'd suggest to contact HP Response Center and log a hardware call.

Hope this help.

Rgds,
Tan Pau Cen

Re: Problem with mounting logical volume

MANOJ SRIVASTAVA — Tue, 11 Jun 2002 02:42:37 GMT

Hi

Please post the o/p oif diskinfo for botht he disks and try to do a dd on the other one ,it look you are having one disk not working,

Manoj Srivastava

Re: Problem with mounting logical volume

Steven Sim Kok Leong — Tue, 11 Jun 2002 03:05:07 GMT

Hi,

There are some data recovery companies which uses sophisticated tools in clean rooms to recover data on damaged harddisks.

If your data is extremely critical, you would want to engage their services. Only if extremely critical because recovery usually costs a bomb in your pocket.

You have to weigh the scales yourself. Hope this helps. Regards.

Steven Sim Kok Leong

Re: Problem with mounting logical volume

Steven Sim Kok Leong — Tue, 11 Jun 2002 03:11:44 GMT

Hi,

Btw, please do yourself a big favour in future by mirroring (RAID 1) or stripe with parity (RAID 5) the critical/sensitive data that you need "desperately" across disks.

Harddisks will always fail. It is only just a matter of time and MTBF is just a rough guide.

Hope this helps. Regards.

Steven Sim Kok Leong