[linux-lvm] Mirror between different SAN fabrics

Matt P slarty.tj at gmail.com
Fri Dec 22 15:51:04 UTC 2006

I can't think of any Volume Manager that would let you mirror disks from 2
separate VGs... I know Veritas won't let you, unless they've changed
something in the last version or 2... But other than that I wouldn't see why
you couldn't use 2 different fabrics, they're just disks to LVM... If you're
having trouble managing 200+ PVs, just build the LV first using only disks
from 1 fabric, then make the second fabric available/visible, and add a
mirror using only those disks... I think that would work...

On 12/20/06, mathias.herzog at postfinance.ch <mathias.herzog at postfinance.ch>
> Hi,
> Using lvm2, I would like to mirror a logical volume between two
> different SAN fabrics to guarantee high availability for my data, even
> if a whole SAN fabric crashes.
> Is there a possibility in lvm2 to define two volume groups, put the
> disks from fabric1 into group 1 and the disks from fabric2 into group 2
> and then create the mirror over the two groups? I didn't find much
> documentation for lvm2 about this, I just know that other Volume
> Managers can handle it.
> It's essential to group the discs together because I use like 100 discs
> for each mirror and I have to be sure that mirroring takes place between
> the two different SAN storages.
> Mathias
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