Les, > Drbd http://www.drbd.org/ does it live. If you can live with periodic > snapshots instead, you can do it with rsync. Correct me if I'm wrong, but this looks like a block-level mechanism, which is exactly what I said I didn't want. I want to be able to intercept the open(2)/write(2)/close(2) calls and after passing them on to normal ext3 filesystem, copy their contents over to an application that will simply mimic the file operations, so that the destination filestore can both be normal, contain other stuff and/or simply be a small part of a large partition. Jonathan
