Western Digital Ultrastar DC HC560 20TB Data Sheet
3.5-inch Helium Platform Enterprise Hard Disk Drive
Driving Data Growth: The Evolution of HDDs
[Image: A Western Digital Ultrastar DC HC560 20TB data center hard drive.]
Hyperscale cloud, CSPs, enterprises, smart video surveillance system partners, and NAS suppliers are seeking storage solutions to keep pace with the rapid growth of data creation. Hard disk drives (HDDs) continue to be the primary choice for cost-effective, large-scale data storage. IDC forecasts that by 2025, HDDs will account for 82% of the capacity shipped into the enterprise market. HDDs currently provide and will continue to provide the capacity, performance, and reliability needed to store vast amounts of data now and in the future. Investment in HDD technology will remain essential to support the global increase in data.
Western Digital, through its vertical integration of industry-leading NAND flash and world-class HDDs, has developed flash-enhanced drives powered by OptiNAND™ technology. Western Digital's HDDs have led the way in increasing areal density with industry-first technologies such as energy-assisted magnetic recording (EAMR), triple actuator (TSA), HelioSeal®, and now OptiNAND technology. By increasing areal density, capacity can be expanded to address storage challenges.
OptiNAND™ Technology Powers 20TB HDD
OptiNAND integrates iNAND® Universal Flash Storage (UFS) with traditional rotating disk media in a flash-enhanced drive (Embedded Flash Drive: EFD). This integration, along with innovative firmware algorithms and system-on-a-chip (SoC) advancements, allows the drive to operate more intelligently. The iNAND offloads extended metadata, enabling enhanced firmware algorithms that increase the tracks per inch (TPI), thereby increasing areal density.
The Ultrastar DC HC560 is the first to implement OptiNAND technology's capacity-enabling features. It achieves an ultra-high capacity of 20TB on a 9-disk platform (2.2TB/platter) using the CMR recording format.
Uncompromising Reliability and Quality for Massive Data Demands
The Ultrastar DC HC560 meets the stringent reliability requirements of modern data centers with a 2.5 million hours Mean Time Between Failures (MTBF) and a 5-year limited warranty. It also offers security and encryption options to protect data from unauthorized use (available in SED models).
Leverage the massive capacity and value of your data center with the reliable Western Digital Ultrastar DC HC560 hard disk drive.
Features and Benefits
Key Features
- Maximum 20TB capacity in a standard 3.5-inch form factor.
- ePMR and CMR technologies suitable for all enterprise applications and environments.
- High capacity enabled by OptiNAND.
- Reliable and proven 7th-generation HelioSeal design with improved power efficiency.
- Industry-leading HDD technologies: OptiNAND, EAMR, TSA, HelioSeal.
- 2.5 million hours (MTBF) and 5-year limited warranty.
- Self-Encrypting Drive (SED) option available.
Applications
- Cloud and hyperscale storage.
- Massive scale-out (MSO) and high-density data centers.
- Distributed file systems.
- Bulk storage solutions for object storage like Ceph™ and OpenStack® Swift.
- Primary/secondary storage for big data analytics platforms like Apache Hadoop®.
Features and Characteristics
Key Features
- High Capacity
- Industry-First Technologies
- Data Center Workloads, Reliability, and Quality
Benefits
- Delivers cost-effective storage with the same footprint for 20TB HDDs.
- OptiNAND, Energy-Assisted Magnetic Recording (EAMR), Triple Stage Actuator (TSA), and HelioSeal enable low power consumption and high capacity.
- Optimized performance for demanding application workloads, handling up to 550TB per year.
- Provides robust reliability with up to 2.5 million hours (MTBF) and a 5-year limited warranty.
Specifications
Table 1: Product Specifications
| Product Model | SATA Model | SAS Model |
| Product Number | WUH722020ALE6L1 | WUH722020BL5201 |
| WUH722020ALE6L4 | ||
| WUH722020BLE6L1 | WUH722020BL5204 | |
| WUH722020BLE6L4 | ||
| Part Number | OF38754 (SED) | OF38651 (SED) |
| OF38755 (Base SE) | OF38652 (Base SE) | |
| Configuration | OF38784 (SED) | OF38785 (Base SE) |
| OF38785 (Base SE) | ||
| Interface | SATA 6Gb/s | SAS 12Gb/s |
| Capacity | 20TB | 20TB |
| Format: Sector Size (Bytes)2 | 4Kn: 4096, 512e: 512 | 4Kn: 4096, 512e: 512 |
| Areal Density (Gb/in2, Max) | 1131 | 1131 |
| Data Buffer3 (MB) | 512 | 512 |
| Rotational Speed (RPM) | 7200 | 7200 |
| Average Latency (ms) | 4.16 | 4.16 |
| Interface Transfer Rate (MB/s, Max) | 600 | 1200 |
| Sustained Transfer Rate (MB/s, Max) / (MiB/s, Max)4 | 291 / 277 | 291 / 277 |
| Random Read4 44KB QD=32 (IOPS) | 212 | 212 |
| Random Write4 44KB QD=32, WCE/WCD (IOPS) | 494/455+ | 565/565++ |
| Error Rate (Unrecoverable Read Bit Error) | 1 in 1015 or less | 1 in 1015 or less |
| Load/Unload Cycles (40°C) | 600,000 | 600,000 |
| Availability (Hours/Day × Days/Week) | 24 hours/365 days | 24 hours/365 days |
| MTBF5 (1 Million Hours, Estimated) | 2.5 | 2.5 |
| Annual Failure Rate5 (AFR, Estimated) | 0.35% | 0.35% |
| Workload | 550TB/year (Max) | 550TB/year (Max) |
| Product Warranty (Years) | 5 | 5 |
Table 2: Environmental and Acoustic Specifications
| Specifications | SATA Model | SAS Model |
| Acoustics | ||
| Idle/Operating (Bel, typical) | 2.0 / 3.2 | 2.0 / 3.2 |
| Power | ||
| Requirements | +5 VDC, +12VDC | +5 VDC, +12VDC |
| Operating (W) | 7.0+ / 6.9++ | 9.3+ / 6.1++ |
| Idle (W) | 6.1+ | 6.1++ |
| Idle Power Efficiency (W/TB) | 0.305+ / 0.305++ | 0.29++ |
| Physical Size | ||
| Height (mm) | 26.1 | 26.1 |
| Dimensions (W x D, mm) | 101.6 (+/-0.25) x 147 | 101.6 (+/-0.25) x 147 |
| Weight (g, Max) | 690 | 690 |
| Environmental Specifications (Operating) | ||
| Temperature (°C) | 5°C – 60°C | 5°C – 60°C |
| Shock (Half-sine, 2 ms, G) | 50 | 50 |
| Vibration (GRMS, 5–500Hz) | 0.7 (XYZ) | 0.7 (XYZ) |
| Environmental Specifications (Non-Operating) | ||
| Temperature (°C) | -40°C – 70°C | -40°C – 70°C |
| Shock (Half-sine, 2 ms, G) | 250 | 250 |
| Vibration (GRMS, 2–200Hz) | 1.04 (XYZ) | 1.04 (XYZ) |
Understanding Ultrastar Product Model Numbers
WUH722020ALxxyz
- W: Western Digital
- U: Ultrastar
- H: Helium (compared to standard 'S')
- 72: 7200 RPM
- 20: Total Capacity (20TB)
- 20: Model Capacity (20TB)
- A: Generation Code
- L: Height 26.1 mm
- xx: Interface
- E6 = 512e SATA 6Gb/s
- 52 = 512e SAS 12Gb/s
- y: Status of Power Disable Pin 3
- 0 = Supports Power Disable Pin 3
- L = Legacy Pin 3 Configuration, no Power Disable support
- z: Data Security Mode
- 1 = SED*: Self-Encrypting Drive. TCG-Enterprise and sanitize crypto scramble/erase.
- 4 = Base (SE)*: No encryption. Sanitize overwrite only.
* ATA Security feature set is standard on SATA.
Part Number Notes:
- + Product Model/Part Number WUH722020ALE6L1/0F38754, WUH722020ALE6L4/0F38755
- ++ Product Model/Part Number WUH722020BLE6L1/0F38784, WUH722020BLE6L4/0F38785
