Info before delving into the unknown

I am after some information.
I have a client that currently has an xserve and an Xraid. They have another spare Xserver and I am planing on getting another Promis Riad for them.
The aim is to have an offsite back up which would be linked with a leased line. What I want to achieve is to have the offsite raid backed up to every night and the offsite Xserve kept up to date with the onsite xserve.
Would Xsan provide me with the ability to do this. As far as I can tell I would be able to setup the two Raids as volumes on the network and then be able to run a backup every night such as retrospect which would run a duplicate.
Is this an option with Xsan or should I look for an alternative solution? Would Xsan also be able to keep the two servers in sync as in update any changes to the offsite that are made on the onsite Xserve
Thanks,
Alexis

I am also looking for an Xsan mirror solution. An Apple Server & Storage Product Manager stated, "Note that rsync is not the best replication engine for use on top of Xsan. It doesn't do file system preallocation so will fragment the heck out of your Xsan volume." With that said what is the best thing to use for mirroring Xsan volumes? Has anyone tried CCC or Superduper, but don't these use rsync also?
Message was edited by: spraguga

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