topic Re: doc for 4 disk vg00 in Operating System - HP-UX

doc for 4 disk vg00

Michael Steele_2 — Mon, 28 Jul 2008 16:20:05 GMT

Hey:

Whose got a good doc listing out the procedure for mirroring vg00 when vg00 has 4 disks?

I'm trying to find out if strict allocation is used everywhere.

Re: doc for 4 disk vg00

Torsten. — Mon, 28 Jul 2008 16:30:48 GMT

How about lvmpvg? You can mirror the first 3 LVOLs to a specific boot disk and others to any disk in pvg.

Re: doc for 4 disk vg00

Steven E. Protter — Mon, 28 Jul 2008 16:47:29 GMT

Shalom,

/stand and / need to be on the boot disk. Beyond that you can use lvchange to change strict allocation if need be to re-arrange the deck prior to the mirror.

SEP

Re: doc for 4 disk vg00

Michael Steele_2 — Mon, 28 Jul 2008 17:40:00 GMT

SEP

What does "..arrange the deck prior to the mirror.." mean?

Besides the strict allocation policy on the two disks, pvchange -B only needs to used on the first disk that includes /, stand and swap. Right? While the second disk woudln't use -B.

And the same goes for the bootlif only appearing on the first disk, used in the setboot commands, lvlnboot, etc.

In summary, as long as none of the o/s lvols, especially / and stand and swap are not on the 2nd disk, then this is a straight mirroring.

You know I can't find the PA-Risc cookbooks on the itrc anymore. Does anyone have a copy?

Re: doc for 4 disk vg00

Torsten. — Tue, 29 Jul 2008 04:39:55 GMT

Let's say you have 2 disks in vg00 without mirror. The first will be bootable and contain at least lvol1,2 and 3, the other disk has the remaining lvols. So only the first needs to have a boot area, the second is just like a data disk.
Same for the mirror.

Re: doc for 4 disk vg00

Trevor Roddam_1 — Tue, 29 Jul 2008 12:33:24 GMT

Depends on the HW platform.

For itanium
http://h21007.www2.hp.com/portal/site/dspp/menuitem.863c3e4cbcdc3f3515b49c108973a801/?ciid=00089099cee021109099cee02110275d6e10RCRD

For PARISC at the end of this document, which I recommend you read before mirroring as it describes what needs to be done to recover given your starting point.

http://www.docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Trevor.

Re: doc for 4 disk vg00

Michael Steele_2 — Wed, 30 Jul 2008 14:17:40 GMT