Depending on the Hardware involved.
You could cluster two of the Servers and use the third as a “Snapshot
server” for routine “snaps” of the Clustered Volumes.
If you have a SAN in place, even better – Create a Virtual environment
as a Pseudo “DR” for the Clustered Servers. Of course you would need
some type of replication software and/or a backup solution in place to
replicate the Clustered data over to the “DR” site.
You could use Operating Systems like SLES10/11 OES2/OES11 for
your Virtual “DR” site on your SAN or if a Server is ‘powerful’ enough,
that can be used for the ‘muscle’ required to run multiple guests within
the host.

Leroy Joseph
Visual Click Software
(eDirectory Management and Reporting)
'eDirectory Management | DSRAZOR for eDirectory'

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