mirroring disks

[Chris Fadrowski]

If i want to mirror to 9 gb drives, (will be vg00) for my OS, how do i go about doing that. Do i need special software? or is there commands that will do the mirroring in HPUX 11.0?

[Kevin Wright]

You need to purchase MirrorDSK/UX from Hp. Not very expensive for what is accomplishes.

[harry d brown jr]

You need a mirror/ux license from hp or your supplier.

[Byron Myers]

After installing mirror-ux, you will use the lvextend command to mirror. Check out the man page on lvextend.

[James R. Ferguson]

Hi Chris:

First, you will need to license (purchase) MirrorDisk/UX (product #B2491BA).

A very good guide to mirroring, in general, can be found in chapter-6 of "Managing Systems and Workgroups: A Guide for HP-UX System Administrators"

http://docs.hp.com/hpux/onlinedocs/B2355-90742/B2355-90742.html

The installation of the MirrorDisk/UX requires a reboot, so plan accordingly. The establishment of a mirrored logical volume can easily and safely be done "online". You should remember that *logical volumes*, not disks, are mirrored with MirrorDisk/UX.

Regards!

...JRF...

[harry d brown jr]

Once you get the license, you would use vgextend/lvextend or sam.

You can mirror Logical Volumes , but not an entire volume group - unless you individually mirror each LV.

[Deshpande Prashant]

Hi
1.Get MirrorDisk/UX (B2491BA) product and install on system.
2. Extend vg00 over new disk.
3. Extend all lvols to new mirror disk.

Thanks.
Prashant.

[Michael Tully]

Hi,

To mirror you vg00 volume group you need
to puchase Product B2491BA which is called
MirrorDisk/UX if you don't already have it.
If you are new to your site you can test
to see if it is already installed:

# /usr/sbin/swlist -l bundle

If it returns something like the below it
is already installed. If not you must buy
it.

B2491BA B.11.00 MirrorDisk/UX

To do the actual mirroring is quite easy.
Below is a simple script to do the job.

# pvcreate -Bf /dev/rdsk/cXtXdX (the disk
you wish to use.
# vgextend /dev/vg00 /dev/dsk/cXtXdX
# mkboot /dev/rdsk/cXtXdX
# mkboot -a "hpux -lq(;0)/stand/vmunix" /dev/rdsk/cXtXdX
# lvlnboot -R
# for LVOL in /dev/vg00/lv*
> do
> echo $LVOL
> lvextend -m 1 $LVOL
> done

HTH
-Michael

[Santosh Nair_1]

One thing to keep in mind is that you have to mirror the /stand filesystem. This has to be the first filesystem on the disk. The order of the other filesystems on the disk doesn't matter as much.

-Santosh