Western Digital DC HC560 20TB Enterprise HDD

Expert Features 20TB Enterprise Capacity : Massive storage for hyperscale environments, enterprise servers, high-density data centers, object storage, distributed file systems, analytics platforms, and serious NAS deployments. SATA 6Gb/s Interface : Model 0F38785 is specifically the SATA version, making it compatible with enterprise systems and storage controllers that support standard SATA drives. 7200 RPM Performance : Enterprise-class 7200 RPM rotational speed keeps bulk-storage performance much stronger than slower archival drives. Up to 291MB/s Sustained Transfer : Delivers up to 291MB/s maximum sustained throughput , giving large sequential workloads proper data-center muscle. 512MB Data Buffer : A generous 512MB cache helps the drive manage heavy sequential transfers and demanding multi-user storage activity. CMR Recording Format : Uses Conventional Magnetic Recording , making it suitable for standard enterprise applications without host-managed zoned-storage requirements. EAMR / ePMR Technology : Energy-assisted recording improves areal density while maintaining the familiar behavior of a conventional enterprise hard drive. OptiNAND Architecture : Integrates embedded iNAND flash for expanded metadata handling and smarter firmware operation. OptiNAND is not hybrid storage and does not act as a user-accessible SSD cache. Nine-Disk Helium Platform : Stores 20TB across a nine-disk platform with approximately 2.2TB per platter , supported by Western Digital’s field-proven HelioSeal design. Triple-Stage Actuator : TSA technology improves head-positioning accuracy at the extremely high track densities required for 20TB enterprise storage. 550TB Annual Workload : Designed to handle workloads of up to 550TB per year , making it ready for far heavier activity than ordinary desktop hard drives. 24×7 Enterprise Operation : Built for continuous operation in always-on servers, storage arrays, cloud platforms, and data-center systems. 2.5-Million-Hour MTBF : Projected 2.5 million hours MTBF , paired with a projected 0.35% annualized failure rate under specified operating conditions. Base SE Security Configuration : This exact model is Base SE , meaning it does not include drive encryption ; it supports sanitize overwrite functionality instead. Expert Specs Specification Details Brand Western Digital Product Series Ultrastar DC HC560 Part Number 0F38785 Internal Model Number WUH722020BLE6L4 Product Type Enterprise Data-Center Hard Drive Capacity 20TB Form Factor 3.5-Inch Platform Nine-Disk Helium Platform Interface SATA 6Gb/s Sector Format 512e Security Configuration Base SE Hardware Encryption No Sanitize Support Overwrite Only Power Disable Pin 3 Not Supported; Legacy Pin 3 Configuration Recording Format CMR Recording Technology EAMR / ePMR Embedded Technology OptiNAND Additional HDD Technologies Triple-Stage Actuator / HelioSeal Areal Density Up to 1,131 Gbit/in² Rotational Speed 7200 RPM Average Rotational Latency 4.16ms Data Buffer 512MB Maximum Interface Transfer Rate 600MB/s Maximum Sustained Transfer Rate 291MB/s / 277MiB/s Random Read Performance 212 IOPS, 4KB QD32 Random Write Performance 565 / 565 IOPS, 4KB QD32, WCE / WCD Non-Recoverable Read Error Rate 1 Error per 10¹⁵ Bits Read Load / Unload Cycles 600,000 Availability Rating 24 Hours × 7 Days Workload Rating Up to 550TB per Year MTBF 2.5 Million Hours, Projected Annualized Failure Rate 0.35%, Projected Operating Power 6.9W Idle Power 5.8W Idle Power Efficiency 0.29W per TB Power Requirement +5VDC and +12VDC Idle Acoustics 2.0 Bels Typical Operating Acoustics 3.2 Bels Typical Operating Temperature 5°C to 60°C Non-Operating Temperature −40°C to 70°C Operating Shock 50G, 2ms Half-Sine Non-Operating Shock 250G, 2ms Half-Sine Operating Vibration 0.7G RMS, 5–500Hz Non-Operating Vibration 1.04G RMS, 2–200Hz Dimensions 147 × 101.6 × 26.1mm Maximum Weight 690g Operating-System Compatibility Windows / Windows Server / Linux Warranty 1-Year Limited Warranty