I am planning on add a second DNS-323 with the new 2T Western Digital drives but wanted to make sure they are compatible first...
Here is the information about the drives....
Western Digital 2TB Caviar Green WD20EADS - SATA 3 Gb/s, 32MB Cache
As hard drive capacities increase, the power required to run those drives increases as well. WD Caviar Green drives make it possible for energy-conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation.
Reduced power consumption - WD has reduced power consumption by up to 40 percent compared to standard desktop drives with the combination of WD's IntelliSeek™, NoTouch™, and IntelliPower™ technologies.
Helps enable eco-friendly PCs - WD Caviar Green drives yield an average drive power savings of 4-5 watts over standard desktop drives making it possible for our energy-conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation.
Specifications
Drive Type: Internal
Capacity (GB): 2000
Interface: SATA 3.0Gb/s
Interface Type: SATA
Spindle Speed (RPM): Intellipower
Buffer Memory: 32MB
Data Transfer Rate on Serial ATA: Up to 3000 Mb/sec
Form Factor: 3.5"
Temperature, Operating (°C): 0 to 60
Temperature, Nonoperating (°C): -40 to 70
Shock, Operating: 2 msec (Gs): 30
Acoustics Idle (bels—sound power): 24 dBA
Acoustics Seek (bels—sound power): 25 dBA
Acoustics Performance Seek (bels—sound power): 29 dBA
Dimensions: 1.03" x 4.0" x 5.8"