topic Re: LVM in Operating System - HP-UX

LVM

Indrajit Bhagat — Fri, 27 Jul 2007 20:48:53 GMT

how can we judgement that particular hardisk in a system is not working and what is steps to remiove the hardisk without data loss.

Re: LVM

A. Clay Stephenson — Fri, 27 Jul 2007 21:21:22 GMT

You will probably see error messages in syslog.log; ioscan -fn will display NO_HW; and commands like dd if=/dev/rdsk/c1t2d0 bs=256k of=/dev/null will fail before completing.

How do you expect to not have data loss if you have a failed disk and are not mirrored?
If are the LVOL's/Volumes on the disk are mirrored then you follow the standard replacement procedure which varies with LVM/VxVM and whether or not the failed disk is a root disk. If you aren't mirrored then you better have backup.

Re: LVM

skt_skt — Fri, 27 Jul 2007 21:52:43 GMT

diskinfo

if there is lvm , try pvdisplay too.

i will vague to give a generic anwer with respect to disk replace. We can give the exact stesp if we can clarify what exactly you have..

Re: LVM

skt_skt — Fri, 27 Jul 2007 21:53:53 GMT

you a r a bad boy @ looking at your profile....

Re: LVM

Ninad_1 — Sat, 28 Jul 2007 00:38:06 GMT

Hi,

Please refer to this doc
http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

This is a very nice doc, which will tell you what you are asking here.

Regards,
Ninad

Re: LVM

Aashique — Sun, 29 Jul 2007 03:59:38 GMT

Hi,
Use this command:
ioscan -fnC disk

check the all HD is okk or not.

If your hard disk is not mirrored then when you will remove the bad HD all data will be lost.

Thanks & Regards

A. Aashique

Re: LVM

tkc — Mon, 30 Jul 2007 01:05:41 GMT

run 'ioscan -fnC disk' to verify if the disk is responding. run 'diskinfo' command on the disk device file to confirm if the system can read info from the disk. run 'dd' command to verify all blocks on the disk are readable.

Re: LVM

Aneesh Mohan — Mon, 30 Jul 2007 02:07:34 GMT

Do
ioscan -fnH Disk h/w path ---check it out whether the s.w state is NO_HW
diskinfo -v /dev/rdsk/cxtyd0 -----give exact value for x , y
dd if=/dev/rdsk/cxtyd0 of=/dev/null bs=1024k count=1000

The above steps give you the clear information about the disk which you are suspecting .

If the disk is bad as per the above analyse and if you have mirror copy of the data do replace the disk .

vgcfgrestore vg /dev/dsk/cxtyd0
vgsync vgname