doc for 4 disk vg00

 
Michael Steele_2
Honored Contributor

doc for 4 disk vg00

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.
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6 REPLIES 6
Torsten.
Acclaimed Contributor

Re: doc for 4 disk vg00

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

Hope this helps!
Regards
Torsten.

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Steven E. Protter
Exalted Contributor

Re: doc for 4 disk vg00

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.

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Michael Steele_2
Honored Contributor

Re: doc for 4 disk vg00

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?
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Torsten.
Acclaimed Contributor

Re: doc for 4 disk vg00

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.

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

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Trevor Roddam_1
Valued Contributor

Re: doc for 4 disk vg00

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.

Baldric, I have a plan so cunning you could pin a tail on it and call it a weasle.
Michael Steele_2
Honored Contributor

Re: doc for 4 disk vg00

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