Western Digital Ultrastar DC HC320 3.5in 26.1MM 8000GB 256MB 7200RPM SAS ULTRA 512E SE P3

General
Model # / Part # See P/N Selector Tab See P/N Selector Tab
Interface SATA 6Gb/s SAS 12Gb/s
Capacity (GB) 6TB / 4TB 6TB / 4TB
Sector Size (Variable, Bytes/sector)
4Kn: 4096 4Kn: 4096, 4104, 4160, 4224
512n*/512e: 512 512n*/512e: 512, 520, 528
Max Areal Density (Gbits/sq. in.) 512e/4Kn: 782, 696 (4TB) 512e/4Kn: 782, 696 (4TB)
512n*: 753 512n*: 753
Form Factor 3.5-inch 3.5-inch
Performance
Data Buffer (MB) 256 256
Rotational Speed (RPM) 7200 7200
Latency Average (ms) 4.16 4.16
Interface Transfer Rate (MB/sec, max) 600 1200
Sustained Transfer Rate 512e/4Kn: Up to 255MB/s; Up to 243MiB/s 512e/4Kn: Up to 255MB/s; Up to 243MiB/s
512n*: 233MB/s; 222MiB/s 512n*: 233MB/s; 222MiB/s
Seek Time (read, ms, typical) 8.0 (read) / 8.6 (write) 8.0 (read) / 8.6 (write)
Reliability
Error Rate (non-recoverable, bits read) 1 in 10 15 1 in 10 15
MTBF (M hours) 2M hours 2M hours
Annual Failure Rate (AFR) 0.44% 0.44%
Load/Unload Cycles 600,000 600,000
Availability (hrs/day x days/wk) 24x7 24x7
Limited Warranty (yrs) 5 5
Acoustics
Idle (Bels) 2.9 2.9
Operational (Bels, typical) 3.6 3.6
Power
Requirement +5V, +12V +5V, +12V
Operating (W, typical) 7.0 12.1
Idle (W) 5.9 7.0
Physical Size
Z-Height (mm) 26.1 (max) 26.1 (max)
Dimensions (width x depth, mm) 101.6 (+/-0.25) x 147 101.6 (+/-0.25) x 147
Weight (g, max) 715 715
Environmental (operating)
Ambient Temperature 5°C to 60°C 5°C to 60°C
Shock (half-sine wave) 70G (2 ms) 70G (2 ms)
Vibration 0.67G RMS (XYZ, 5 to 500Hz) 0.67G RMS (XYZ, 5 to 500Hz)
Environmental (non-operating)
Ambient Temperature -40°C to 70°C -40°C to 70°C
Shock (half-sine wave) 300G (2 ms) 300G (2 ms)
Vibration 1.04G RMS (XYZ, 2 to 200Hz) 1.04G RMS (XYZ, 2 to 200Hz)