I've been reading anything I could find about this subject but have not yet encountered a definitive answer.
So here it is - which (current) 2TB drive works flawlessly with the DNS-323 in RAID1 or RAID0 (not JBOD)?
The local hardware pusher has the following four available:
Hitachi Deskstar 2TB 7K2000 (HDS722020ALA330) 3.5-inch 7200RPM 32MB SATA 3Gb/s
Western Digital 2TB Caviar Green (WD20EARS) 64MB Cache, SATA 3Gb/s IntelliPower Hard Drive
Seagate Barracudaź Green 2TB SATA 6Gb/s 64MB Cache Hard Drive (ST2000DL003)
Samsung 2TB (HD204UI) Hard Disk Drive
All are within same price range so which brand doesn't matter to me. None of them is listed in the supported hard drive list, which is why I am making this post.
One note - the Hitachi is listed as true 512b sector size and the Seagate is listed as ture 4096b sector size in the datasheets - while both WD and Samsung lists 512b through emulation.