Western Digital Ultrastar 8TB SATA 6 Gb/s

Product Identification

• Manufacturer: Western Digital

• Product Family: Ultrastar® Enterprise Series

• Model Number: WUS721208BLE6L4

• Capacity: 8 TB

• Form Factor: 3.5-inch Enterprise Hard Disk Drive

Part Number Breakdown (WUS721208BLE6L4)

• W = Western Digital

• U = Ultrastar

• S = Standard / 7200 RPM Class

• 72 = 7200 RPM

• 12 = Maximum Capacity Family (12 TB Max Class)

• 08 = Drive Capacity (8 TB)

• B = Generation Code

• L = 26.1 mm Height (Standard 3.5-inch Form Factor)

• E6 = SATA 6Gb/s, 512e Sector Format

• L = Security Option (Standard / Instant Secure Erase – ISE)

• 4 = Feature Code (Power Disable Pin 3 Support)

Technical Specifications

Performance

• Formatted Capacity: 8 TB

• Interface: SATA 6 Gb/s

• Sector Size (Bytes/Sector): 512e (512-byte Emulation)

• Rotational Speed: 7,200 RPM

• Cache / Data Buffer: 256 MB

• Sustained Transfer Rate: Up to 255 MB/s

• Average Latency: 4.16 ms

Reliability & Data Integrity

• MTBF (Mean Time Between Failures): 2,500,000 hours

• AFR (Annualized Failure Rate): 0.35%

• Load/Unload Cycles: 600,000

• Non-recoverable Read Errors: 1 in 10^15 bits read

• Workload Rating: Up to 550 TB/year

• Availability / Duty Cycle: 24/7 Enterprise Operation

• Warranty: 5-Year Limited Warranty

Power Management

• Operating Voltage: +5V (+/-5%), +12V (+/-5%)

• Operating Power (Read/Write): ~8.8 W

• Idle Power: ~5.6 W

• Power Efficiency (W/TB): ~0.70 W/TB

Environmental Specifications

• Operating Temperature: 5°C to 60°C

• Non-Operating Temperature: -40°C to 70°C

• Operating Shock (2ms): 70G

• Non-Operating Shock (2ms): 300G

• Acoustics (Idle): ~2.0 Bels (typical)

Physical Dimensions

• Height: 26.1 mm (1.028 in)

• Width: 101.6 mm (4.00 in)

• Length: 147.0 mm (5.787 in)

• Weight: 660 g (max)