Yeah I just double checked. Both of the Sans we run are on the latest Areca firmware by date. I had made sure 2 months ago when I built them that they had the latest firmwares, as I knew it could be ages before we move them up to a new one. I remember the trouble with the SN04, mainly how it affected the 1.5TB drives. I had one that was affected, but it wasn't in a RAID array. Updated the firmware anyhow though . Thanks for the replies man!