topic Re: disk info migration in Operating System - HP-UX

disk info migration

???_185 — Wed, 30 Nov 2005 03:09:06 GMT

rx7620 has ds2100 four disk.
but, by mistake, It need to be changed 1000rpm disk to 15000 rpm disk.
10000rpm one disk has vg01 info.If insert 15,000 rpm disk, how can I keep the volume group infomation without deleting. 10000 rpm disk path is /dev/dsk/c2t5d0.
is it has to be made same volume group name and logical volume name?

Re: disk info migration

Sivakumar TS — Wed, 30 Nov 2005 03:40:33 GMT

Hi zungwon,

you can run

#vgcfgrestore

command after replaccing disk. The volume group info will be restored to the disk.

please refer vgcfgrestore man page for detailed syntax.

With Regards,

Siva.

Re: disk info migration

Shathishkannan — Thu, 01 Dec 2005 20:26:26 GMT

Hi Zungwon,

First run the vgcfgbackup, then take the data backup, then add the new disks and run vgcfgrestore. you will get the same LVM configuration. For safe you can also take the backup of lvmconf file

Thanks
Shathish

Re: disk info migration

Devender Khatana — Fri, 02 Dec 2005 00:19:32 GMT

Hi,

There are many ways of achiving this. A simple way in my opinion would be to extend your VG to new disk and then remove the old disk after moving LE's to new disk using pvmove command.

But the requirement for this you should have option to add another disk without removing the OLD one and the benefit is that you will not require to restore backup and can be even done online with slight copromize of performance.

#pvcreate /dev/rdsk/cxtydz
#vgextend /dev/vg00 /dev/dsk/cxtydz

(Where /dev/dsk/cxtydz and /dev/rdsk/cxtydz is the device file of new disk at newer location)

As DS2100 can accomodate only 4 disks I would even consider removing one of the disks from other VG if possible to achive this.

HTH,
Devender