Item | UltraStar DC HC555 HDD |
Capacity¹ (TB) and Model Number | 20TB: WUH722020CLxxyz; 18TB: WUH722018CLxxyz; 16TB:
WUH722016CLxxyz; 14TB: WUH722014CLxxyz; 12TB: WUH722012CLxxyz |
Configuration - Interface | SATA 6Gb/s and SAS 12Gb/s |
Configuration - Format: Sector size (bytes)⁴ | 512e: 512; 4Kn: 4096 |
Configuration - Areal density (Gbits/sq. in.) | 20TB: 1137; 12 - 18TB: 1024 |
Performance - Data buffer⁵ (MB) | 512 |
Performance - Rotational speed (RPM) | 7200 |
Performance - Latency average (ms) | 4.16 |
Performance - Interface transfer rate (max) | SATA 6Gb/s; SAS 12Gb/s |
Performance - Sustained transfer rate⁷ (MB/s, max) / (MiB/s, max) | 20TB: 285 / 272; 12 - 18TB: 269 / 257 |
Environmental Specifications (Operating) - Temperature⁸ | 5°C to 60°C |
Environmental Specifications (Operating) - Shock (half-sine wave 2
ms, G) | 50 |
Environmental Specifications (Operating) - Vibration (G RMS 5 to
500 Hz) | 0.67 (XYZ) |
Environmental Specifications (Non-Operating) - Ambient Temperature | -40° to 70°C |
Environmental Specifications (Non-Operating) - Shock (half-sine
wave, G) | 250 |
Environmental Specifications (Non-Operating) - Vibration (G RMS 2
to 200 Hz) | 1.04 (XYZ) |
Reliability - Error rate (non-recoverable, bits read) | 1 in 10¹⁵ |
Reliability - Load/Unload cycles (at 40°C) | 600,000 |
Reliability - Availability (hrs/day × days/wk) | 24×7 |
Reliability - MTBF² (hours) | 2,500,000 |
Reliability - Annualized Failure Rate² (AFR) | 0.35% |
Reliability - Limited Warranty³ | 5 Years |
Power Management - Requirement | +5 VDC, +12VDC |
Power Management - Operating (W, typical)⁸ - 14 - 20TB(SATA) | 6.4 |
Power Management - Operating (W, typical)⁸ - 14 - 20TB(SAS) | 9.2 |
Power Management - Operating (W, typical)⁸ - 12TB(SAS) | 8.8 |
Power Management - Idle⁹ (W) - 14 - 20TB(SATA) | 5.3 |
Power Management - Idle⁹ (W) - 14 - 20TB(SAS) | 5.7 |
Power Management - Idle⁹ (W) - 12TB(SAS) | 5.4 |
Power Management - Power consumption efficiency at idle (W/TB) -
20TB(SATA) | 0.27 |
Power Management - Power consumption efficiency at idle (W/TB) -
20TB(SAS) | 0.28 |
Power Management - Power consumption efficiency at idle (W/TB) -
18TB(SATA) | 0.29 |
Power Management - Power consumption efficiency at idle (W/TB) -
18TB(SAS) | 0.32 |
Power Management - Power consumption efficiency at idle (W/TB) -
16TB(SATA) | 0.33 |
Power Management - Power consumption efficiency at idle (W/TB) -
16TB(SAS) | 0.36 |
Power Management - Power consumption efficiency at idle (W/TB) -
14TB(SATA) | 0.38 |
Power Management - Power consumption efficiency at idle (W/TB) -
14TB(SAS) | 0.41 |
Power Management - Power consumption efficiency at idle (W/TB) -
12TB(SAS) | 0.45 |
Physical Dimensions - Height (max) | 1.028 in. (26.1 mm) max |
Physical Dimensions - Length (max) | 5.787 in. (147.0 mm) max |
Physical Dimensions - Width (max, ±.01 in.) | 4.0 in. (101.6 mm) |
Physical Dimensions - Weight (max, ±10%) - 12TB | 1.49 lb. (679 g) |
Physical Dimensions - Weight (max, ±10%) - 14 - 20TB | 1.52 lb. (690 g) |
