Western Digital Ultrastar DC HC570 22 TB SATA 6 Gb/s

Product Overview

• Product Family: Western Digital Ultrastar® DC HC570

• Model / Part Number: WUH722222ALE6L4

• Capacity: 22 TB

• Form Factor: 3.5-inch Enterprise Hard Disk Drive

• Target Applications: Cloud & Enterprise Data Centers, Hyperscale Storage, Big Data & Distributed File Systems (Ceph, Hadoop), Enterprise NAS & SAN, Video Surveillance.

Part Number Breakdown (WUH722222ALE6L4)

• W = Western Digital

• U = Ultrastar

• H = Helium (HelioSeal® Technology)

• 72 = 7,200 RPM

• 22 = 22TB Maximum Capacity Family

• 22 = 22TB Model Capacity

• A = Generation Code

• L = 26.1mm z-height

• E6 = SATA 6Gb/s, 512e Sector Format

• L = Legacy Pin 3 Disable / Power Disable support

• 4 = Standard Secure Erase (Sanitize)

Key Technologies & Features

• OptiNAND™ Technology: Integrates an onboard iNAND® Embedded Flash Drive (EFD) with traditional magnetic media to deliver enhanced capacity, performance, and data resilience.

• ArmorCache™ Technology: Provides the performance of Write Cache Enabled (WCE) mode combined with the enterprise data protection of Write Cache Disabled (WCD) mode under unexpected power loss.

• ePMR & Triple-Stage Actuator (TSA): Utilizes Energy-Assisted Perpendicular Magnetic Recording alongside a high-precision 3-stage actuator to maximize areal density and track-following accuracy.

• 10-Disk HelioSeal® Design: Uses a hermetically sealed helium environment to reduce aerodynamic drag, power consumption, and mechanical wear across a 10-platter configuration.

Technical Specifications

Performance & Configuration

• Interface: SATA 6 Gb/s

• Formatted Capacity: 22 TB (22,000 GB)

• Sector Format: 512e

• Rotational Speed: 7,200 RPM

• Data Buffer (Cache): 512 MB

• Sustained Transfer Rate (Max): Up to 291 MB/s (277 MiB/s)

Reliability & Data Integrity

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

• AFR (Annualized Failure Rate): 0.35%

• Workload Rating: 550 TB/year

• Non-recoverable Read Error Rate: 1 error in $10^{15}$ bits read

• Load/Unload Cycles: 600,000

• Limited Warranty: 5 Years

Electrical & Power Consumption

• Operating Power (Random Read/Write): ~9.3 W

• Idle Power: ~5.7 W

• Power Supply Requirements: +5VDC (±5%), +12VDC (+10%/-8%)

Environmental & Physical

• Operating Temperature: 5°C to 60°C

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

• Operating Shock (2ms): 40G

• Non-Operating Shock (2ms): 200G / 150G (dependent on axis)

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

• Dimensions (H x W x L): 26.1 mm × 101.6 mm × 147.0 mm

• Weight (Max): 670 g