Belatedly, you probably want to check out DRBD. It can do sync and async mirroring of Linux block devices over a network. http://www.drbd.org/ http://www.drbd.

Belatedly, you probably want to check out DRBD. It can do sync and async mirroring of Linux block devices over a network. http://www.drbd.org/ http://www.drbd.org/ With a cluster-aware filesystem like GFS, both copies can be r/w (though that might be a little touchy), otherwise it can be used for warm standby, or, in conjunction with LVM and an appropriate filesystem, you could create snapshots on the primary, and then mount them as read-only on the secondary (but this may not be very appropriate for any DB scenarios).