Recovery with mirrored disk on RX6600

[Mohamed Amine]

Hello all,

We have an RX6600 with an 8 ports internal SAS controller (AB036B) and two (02) 146 GB disks.

At the customer site, they usually break the mirror, patch, test and resume the mirror (soft mirror).

Now that we have the hardware raid mirror, we'd like to know how to do that.
I tried to follow the white paper (http://preview.tinyurl.com/yz9kh72) but did not succeed in recovering from the unpatched copy (Reverting to a previous copy of a mirrored set using the manual method)

Did someone try before and succeed, am I missing something !?

Thanks for your help.

[Steven E. Protter]

Shalom,

Hard mirror is very simple especially with only two disks.

Simply pull one of the disks out prior to patch.

Patch and test. When satisfied, re-insert the pulled disk and the hardware raid utility will recover the disk.

This assumes you have raid 1 mirroring set up on the hardware.

At console, boot, there will be a prompt for the raid controller that lets you set up or see what mirror configutration.

SEP

[Mohamed Amine]

Hello,

Thanks for your answer.
Actually, resynching the RAID 1 from "pathed" --> "unpatched" is pretty easy but recovering in the other way is impossible so far. I have ended by loosing my system !

[Steven E. Protter]

There really is not much of a way to recover on a hardware raid system from loss of disk.

Hardware raid presents 1 disk to the system.

You could stop this mirror breaking procedure and instead use Ignite make_net_recovery or make_tape_recovery to create recovery points for the system prior to patching.

SEP

[James R. Ferguson]

Hi:

As an alternative, you might want to try using DRD (Dynamic Root Disk) if you have a spare disk of size that is sufficient to hold your vg00 data. This can be any disk, including one in a SAN. DRD is available for 11.23 or 11.31.

See the DRD documentation for more:

http://www.docs.hp.com/en/hpux11iv3.html

http://h71028.www7.hp.com/enterprise/w1/en/os/hpux11i-system-management-dynamic-root-disk.html

Regards!

...JRF...

[Jacques Carriere]

Bonjour,

If you have OLR installed on your 6600, you may want to use
pvchange -a N /dev/rdsk/...
which will take one of your mirrored disks offline. You can then patch the system and then reactivate the mirror.

Jacques