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recovery

 
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himacs
Super Advisor

recovery

Hi Admins,

I am going to reboot B.11.23 server as the part of patch deployment.

The server is with mirrored disks and has no ignite backup.
As the recovery option what i am planning is to remove secondary disk from the server before reboot and insert again if server does not come up with primary disk after reboot.

Please tell me is that feasible? and if yes,what are the steps i have to follow.

Regards
himacs
26 REPLIES 26
Horia Chirculescu
Honored Contributor

Re: recovery

Hello,

Would be great if you would have in handy a spare disk to make first a mirror image on it (in order to boot up the server with both mirrored disks on-line)

Horia.
Best regards from Romania,
Horia.
Prasanth Thomas
Valued Contributor

Re: recovery

Hi,

I think better you have to take the backup before doing any upgradation actovty on production server. Its very easy to install and configure the ignite on hp-ux server.
Please find the below links.

http://docs.hp.com/en/5992-5037/5992-5037.pdf

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1265181350697+28353475&threadId=1283820

Regards,
Prasanth Thomas.
R.K. #
Honored Contributor

Re: recovery

Hi Himacs,

You can also go with DRD.
Don't fix what ain't broke
Michal Kapalka (mikap)
Honored Contributor

Re: recovery

hi,

i think you don't need to do it, because if the system is mirrored, and you already patched it, so the applied patches are on both disk.

and if you remove the disk, when the OS is runneing, you could make the second disk incostintent, so maybe the system will be not able boot form this disk.

sorry but patching of the system without ingnite backup is for me not understable.

mikap
Johnson Punniyalingam
Honored Contributor

Re: recovery

Please tell me is that feasible? and if yes,<<<

feasible for your case, tells how confident you are and How critical is the Server, if you don't have Ignite Backup ?

"precaution is Better than Cure."

Ok when you talk about feasible? Yes it can be done

Make sure you can boot your server Using your secondary mirror disk, before you proceed to patching.

Break mirror of your secondary disk

1) Remove lvol mirrors:(lvol 1 ,2,3,4 ..etc)
# lvreduce -m 0 /dev/vg00/lvol2 /dev/dsk/c2t6d0

2) # vgreduce /dev/vg00 /dev/dsk/c2t6d0 -> Sec disk

de-attach your "Sec-disk" and boot from your primary disk
Problems are common to all, but attitude makes the difference
R.K. #
Honored Contributor

Re: recovery

Hi again,

Have you already patched the system or yet to do it?
If yes and your server already rebooted then everythign is fine.

Else, use DRD as you do not have ignite.
Don't fix what ain't broke
himacs
Super Advisor

Re: recovery

Hi All,

Thanks for the responses.

i am planning to follow below steps.

1.Remove sec disk while server is up
2.reboot the server
3.apply patch
4.reboot the server with pri disk
5.If server is not coming up,shutdown the server ,inert sec disk and boot with sec
6.If everything is fine with primary,insert sec disk later
7.And pri will syc with sec automatically,so all the changes done in pri will apply in sec.

About the backup ,i can only take network ignite backup - make_net_recovery

I cant think abt DRD


So please ur suggestions on above points

Regards
himacs
Johnson Punniyalingam
Honored Contributor

Re: recovery

Once "Your Patching Activity" completed.

you can refer to "Good Disk Gone Bad" PDF file and remirror you "Secondary Disk"
Problems are common to all, but attitude makes the difference
Johnson Punniyalingam
Honored Contributor

Re: recovery

>>About the backup ,i can only take network ignite backup - make_net_recovery<<<

YES, At least you should do that, before patching Your Server
Problems are common to all, but attitude makes the difference