Another hard drive to add to the DNS-325 list...
I installed two Seagate Barracuda ST3000DM001, 7200.12, SATA, 3TB about a month ago in RAID-1 configuration. The only issue was the firmware, which I had to upgrade to 1.02 before it would recognize the larger hard drives. Curiously, the drives are marked on the box as STBD3000100. But the DNS-325 reports the first number I listed above.