mirroring different volume groups

[Jimmy Roux]

Has anyone mirrored different volume groups?
For example:
vg00:
c0t5d0
c0t6d0

mirrored to:

vg01:
c1t5d0
c1t6d0

....rather than the usual vgextend /dev/vg00 ...
then mirroring the logical volumes?

[Rodney Hills]

I belivew LVM mirroring does not have the option to mirror two different volume groups.

That is because mirrors are "extended" allocated blocks which have to reside in the same volume group.

-- Rod Hills

[Tom Maloy]

You can't mirror two volume groups together. But you can make a mirror and then split it in two. Of course, the off-line copy will get very stale very fast...

Tom

[Sanjay_6]

Hi Jimmy,

You cannot mirror lv between diffent VG's. The primary and the mirror copy should be part of the same VG. can be on different disks.

Hope this helps.

Regds

[Sajid_1]

You can't do it through HP's Mirror/UX software. It will allow only to mirror two logical volumes. You have to go for a hardware RAID-1

[Jimmy Roux]

Thanks to all for the quick reply.

I was hoping, however minute, that there's somebody out there who was able to pierce through MirrorDisk/UX and practically created their own unsupported version of MirrorDisk/UX to allow them for mirroring to do whatever they wanted.

Cheers everyone,

Jimmy

[Martin Johnson]

Why don't you look into hardware mirroring? We use EMC storage to do RAID 1, but there are storage products from many vendors that you could use.

HTH
Marty