topic Re: split vg00 mirror in Operating System - HP-UX

split vg00 mirror

Patricio Besteiro — Mon, 19 Jul 2010 13:12:25 GMT

Is it possible to split vg00 mirror as a backup before patching the server? 11.11 and 11.23

Thanks in advance!

Re: split vg00 mirror

melvyn burnard — Mon, 19 Jul 2010 13:15:56 GMT

yes it is.
Also, for 11.23 you may want to take a look at Dynamic Root Disk(DRD)
http://www.hp.com/go/drd

Re: split vg00 mirror

Steven E. Protter — Mon, 19 Jul 2010 13:22:43 GMT

Shalom,

Also highly recommended is an Ignite backup before patching.

make_tape_recovery
# if tape drive is available.
make_net_recovery
# To an NFS share where read-write privileges exist.

SEP

Re: split vg00 mirror

KapilRaj — Mon, 19 Jul 2010 14:55:19 GMT

Another way would be to clone it using the storage array utilities (Only if you are booting off SAN).

Re: split vg00 mirror

shanmuhanandam — Tue, 20 Jul 2010 05:34:28 GMT

HI,
yes you can split the vg00 mirror for patching. Check the lvsplit & lvmerge man pages for more details.

Thanks,
Shan.

Re: split vg00 mirror

chris huys_4 — Tue, 20 Jul 2010 13:31:06 GMT

Hi,

splitting/merging can help for recovering from a bad patch installation, but not if the bad patchinstallation, causes the system to panic and makes the primary bootdisk unbootable.

Then booting from the before "lvsplitted" mirrorbootdisk isnt possible and a ignite restore is still needed. This because the mirrorbootdisk will have volumes with names like lvol3b and changed minor number of the lvol device files etc.. which isnt something the hp-ux loader will be able to live with..

So what looks as a good idea, actually isnt to interesting..

Greetz,
Chris