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тАО01-08-2003 07:55 AM
тАО01-08-2003 07:55 AM
Temporarily break bootable root mirror
We have installed MirrorDisk/UX and mirrored our boot disk (and the mirror is bootable).
We checked by rebooting and did bo alt to ensure that everything was ok....it was.
We'd like to update our 11.0 system to the latest patch bundle, December 2002. But, we are nervous and were wondering if we can do the following:
1. Break our mirrored root drive
2. Install the patch bundle
3. Test and ensure that everything is ok
4. If all is fine, remirror and if we encounter problems, we can still boot with our mirrored drive and resync so we are back to our original system before applying the patch.
So two questions:
1. Can this be done?
2. Do I just use lvsplit and lvmerge to accomplish this?
TIA!
Cindy
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тАО01-08-2003 08:02 AM
тАО01-08-2003 08:02 AM
Re: Temporarily break bootable root mirror
I think that "lvreduce -m 0" stop mirroring.
And after manip done lvextend -m 1.
Regards,
Jerome
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тАО01-08-2003 08:08 AM
тАО01-08-2003 08:08 AM
Re: Temporarily break bootable root mirror
With just lvsplit and lvmerge it's not that simple since the splitted lvols are not directly bootable (if I remember correct). Furthermore there was a bug in a specific lvm patch where a vg with a splitted lvol could not be activated anymore!
So I think a better way is this:
- shut down the system
- remove mirror disk
- but up with quorum check disables (at ISL> hpux -lq)
- now do the upgrade
If everything worked fine re-insert mirror disks and run vgsync. If something went wrong shut down the system, insert mirror disks again and boot from there and then do the sync the other way around.
Furthermore its always a good idea to have a working ignite tape at hand :-
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тАО01-09-2003 09:36 PM
тАО01-09-2003 09:36 PM
Re: Temporarily break bootable root mirror
In my option, I would suggest a better way to apply patch, using Ignite-UX to backup the root disk, then applying the patch. I think it is safe and simpler than what you are trying to do.
regards
tommy
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тАО01-09-2003 09:55 PM
тАО01-09-2003 09:55 PM