Ultrastar DC HC320 8TB 3.5-inch Data Center Hard Drive Medium Capacity for High Access-Density Requirements Features: Excellent random and sequential performance 8TB capacity point supports traditional IT systems Sustained transfer rate up to 255MB/s Choice of 12Gb/s SAS or 6Gb/s SATA Advanced Format 4Kn and 512e models Self-Encrypting Drive options 5-year limited warranty Specifications: Interface SATA 6 Gb/s SAS 12 Gb/s Capacity 8TB 8TB Format: Sector size(bytes) 4Kn: 512e: 4096 512s 4096, 4112, 4160, 4224 512, 520, 528 Performance Data buffer (MB) 256 256 Rotational speed (RPM) 7200 7200 Interface transfer rate (MB/s, max) 600 1200 Sustained transfer rate (MiB/s, typical) (MB/s, typical) Up to 243 Up to 255 Up to 243 Up to 255 Reliability Error rate (non-recoverable bits read) 1 in 1015 1 in 1015 MTBF (M hours) 2 2 Annualized Failure Rate (AFR) 0.44% 0.44% Load/Unload cycles (at 40°C) 600,000 600,000 Availability (hrs/day x days/wk) 24x7 24x7 Limited Warranty (yrs) 5 5 Acoustics Idle/Operating (Bels, typical) 2.9/3.6 2.9/3.6 Power Requirement +5 VDC, +12VDC +5 VDC, +12VDC Operating (W, typical) 8.8 12.8 Idle (W) 7.5 8.4 Physical Size z-height (mm) 26.1 26.1 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, 2ms, G) 70 70