topic vgcfgrestore command in Operating System - HP-UX

vgcfgrestore command

Sagar Sirdesai — Tue, 08 Mar 2011 13:42:02 GMT

I've failed mirror disk. This disk is now replaced.
I've run below command to add it to the volume group vgdb

serverA:pvcreate -f /dev/rdsk/c9t12d0
Physical volume "/dev/rdsk/c9t12d0" has been successfully created.
serverA> vgcfgrestore -n /dev/vgdb /dev/rdsk/c9t12d0
vgcfgrestore: Couldn't query physical volume "/dev/dsk/c9t12d0":
The specified path does not correspond to physical volume attached to
this volume group
Volume Group configuration has been restored to /dev/rdsk/c9t12d0
serverA> vgchange -a y vgdb
Volume group "vgdb" has been successfully changed.

But still the disk is not visible in vgdisplay command

Please advise

Sagar

Re: vgcfgrestore command

Torsten. — Tue, 08 Mar 2011 14:30:28 GMT

How about

ioscan -fn

Re: vgcfgrestore command

Sagar Sirdesai — Tue, 08 Mar 2011 15:01:29 GMT

Hi
I can see the disk when I run the command
ioscan -fn

Re: vgcfgrestore command

Bill Hassell — Tue, 08 Mar 2011 15:28:56 GMT

The procedures are quite different between the various versions of HP-UX. Also, depending on whether you have pvchange -a option, the procedures are not the same.

At the most common level (10.20 an higher), you must remove the mirroring using lvreduce -m 0 -A n . Then vgreduce the bad disk out of the VG. Now replace the disk, run pvcreate, add the disk to the VG, then lvextend -m 1 .

There are simpler ways with 11.11 and higher when you can hot swap the disk, but this assumes that the failure doesn't cause problems with the commands.

Re: vgcfgrestore command

Torsten. — Tue, 08 Mar 2011 15:43:02 GMT

Normally there is no need to reduce the mirror if the system can do LVM Online Disk Replacement (LVM OLR).
In this case you do "pvchange -a N ..." for the disk to prevent LVM access.

Re: vgcfgrestore command

Sagar Sirdesai — Tue, 08 Mar 2011 15:47:42 GMT

Thanks All,
I used the old method.
vgextend and then I did a lvextend -m 1

Torsten : I'm not sure when is pvchange -a n / y command useful.

Please advise

Sagar

Re: vgcfgrestore command

Torsten. — Tue, 08 Mar 2011 15:50:18 GMT

See

When_Good_Disks_Go_Bad_WP
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01911837/c01911837.pdf

Re: vgcfgrestore command

P Arumugavel — Tue, 08 Mar 2011 18:21:28 GMT

hi,

see the below bdf's.

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02263517/c02263517.pdf

http://maben.homeip.net/static/computers/HP/hpux/11/LVM%20Online%20Disk%20Replacement.pdf

Rgds...