Re: Mirror between different SAN fabrics

["Matt P" <slarty.tj@gmail.com>]

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@postfinance.ch <mathias.herzog@postfinance.ch > wrote:

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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