@ Cameron, Andy, Steve & Nigel
@ Cameron Colley: the TeraStation III, like most Nas boxes I've tested, doesn't come with any Linux software on the CD (probably something to do with that tiny desktop market share Linux has). Linux file shares are supported via NFS on the TeraStation III though.
@ Andy Turner: Many Nas boxes will do what you want. The Promise NS4600, recently reviewed on the Reg, calls it 'replication' and the TeraStation III calls it a 'distributed file system'.
@ Steven R: FTP is often very quick, but doesn't reflect how most users use a Nas (I think!)
@ Nigel 11: The TeraStation III doesn't have ECC Ram. When asked whether this will increase the likelihood of Raid 5 errors, Buffalo responds:
"Absolutely not, we use software RAID controllers to constantly synchronise and monitor the array when RAID 5 is enabled.
When configuring RAID 5, either on a server or a dedicated NAS product there is a lengthy synchronisation check that takes place to make sure everything is working correctly, you can even schedule this check to happen on our product every week if you so wish."