topic Re: Adding a new disk for mirroring in Operating System - HP-UX

Adding a new disk for mirroring

Vijay Dsouza — Mon, 07 Jul 2008 06:27:34 GMT

Friends,
In my existing setup of 11.23 I have a disk of 300 GB on which a filesystem exists (CRITICAL DATA), I have decided to mirror this to another disk after adding the new disk of same capacity. Are my steps correct after recognising the disk to implement a disk mirror?

1. pvcreate -f /dev/rdsk/NEWDISK

2. vgextend /dev/vg01 /dev/dsk/NEWDISK

3. lvextend -m 1 /dev/vg01/lvol1 /dev/dsk/NEWDISK

Appreciate a quick reply , just wanna be sure to avoid :(.....

Thanks
Vijay

Re: Adding a new disk for mirroring

Torsten. — Mon, 07 Jul 2008 06:33:33 GMT

For normal data disks (not boot disks) the commands are fine.

Leave "-f" away in step 1, this is more safe.

Re: Adding a new disk for mirroring

Steven E. Protter — Mon, 07 Jul 2008 06:34:19 GMT

Shalom,

If you have mirror/ux installed, your procedure will work.

SEP

Re: Adding a new disk for mirroring

Sharma Sanjeev — Thu, 10 Jul 2008 10:56:34 GMT

Hi Vijay

Your Steps are correct, but if you have more lvol you can use for loop otherwise you have to do lvextend for all lvol
e.g
for i in /dev/vg01/lvol*
do
lvextend -m 1 /dev/vg01/$i /dev/dsk/NEWDISK
done

Regards
Sanjeev

Re: Adding a new disk for mirroring

Adam Winebaugh — Thu, 10 Jul 2008 12:04:47 GMT

Vijay,
YOur process will work. I tend to not use the -f option unless I have no choice. You don't want to force an operation unless you absolutley have to.

Re: Adding a new disk for mirroring

Khairul_1 — Thu, 10 Jul 2008 12:48:45 GMT

Hi Vijay,

Your process is OK. You can leave -f because your secondary disk is new. If you use -f no problem only force it to create physical volume.

Thanks
Khairul
Bangladesh

Re: Adding a new disk for mirroring

Vijay Dsouza — Thu, 10 Jul 2008 12:51:32 GMT

Thanks Friends ! I have done this activity and things are fine . As advised i have not used the -f option because the disk is new and it does not have any previous LVM information on it.