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SKU: WUH721816ALE6L4
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Data center decisions are driven by TCO. Higher capacity hard drives play a role in reducing TCO. Higher capacity HDDs enable data centers to lower CapEx by reducing supporting hardware- and system-level costs when compared to lower capacity drives. Helium-sealed, low power, high-reliability drives reduce energy and maintenance costs, contributing to OpEx savings. Higher capacity drives require fewer racks and consume less power per TB at idle, resulting in significant overall TCO reduction for data center environments.

The WD Ultrastar DC HC550 integrates a suite of technologies on a 9-disk platform to create a new class of HDDs. It uses Energy-Assisted Magnetic Recording (EAMR) technology to improve writability and increase areal density, while a Triple Stage Actuator (TSA) enhances head-positioning accuracy, delivering better performance and increased areal density. Lastly, this drive uses HelioSeal technology, which is now in its 6th generation.

With its massive capacity and 2.5 million hour MTBF reliability rating, the UltraStar DC HC550 is made for object storage implementations. Object storage systems with erasure coding provide better data durability compared to RAID systems, given their tolerance for simultaneous error conditions. The DC HC550 offers security and encryption options to help protect data from unauthorized use, including SED models in both SATA and SAS. A SED-FIPS will be available in SAS configuration.
The breadth and depth of Big Data is driving the universal need for higher capacities across a broad spectrum of applications and workloads. Laying the foundation for a worry-free data center, Western Digital delivers the capacity to conquer the data explosion with the Ultrastar DC HC500 series of hard disk drives (HDDs). The DC HC500 series is designed for public and private cloud environments where storage density and cost-efficient infrastructure is critical. The 16TB Ultrastar DC HC550 HDDs are the first commercial implementation of Energy-Assisted Magnetic Recording technology and utilize the industry’s first Triple Stage Actuator. These technologies, integrated with HelioSeal on a 9-disk platform, deliver the highest areal density and unmatched Total Cost of Ownership for customer and market needs.
Western Digital is the first to deliver Energy-Assisted Magnetic Recording (EAMR) technology and a Triple Stage Actuator (TSA). These new technologies combined with further mechanical innovations and HelioSeal technology provide the industry’s highest capacities to enable data at scale with optimized TCO for data center architectures, while maintaining workload reliability and performance.
| General | |
| Device Type | Hard drive – internal |
| Capacity | 16 TB |
| Model Number | WUH721816ALE6L4 |
| Form Factor | 3.5″ |
| Interface | SATA 6Gb/s |
| Buffer Size | 512 MB |
| Features | Rotational Vibration Safeguard (RVS), HelioSeal, Conventional magnetic recording (CMR), Media Cache Plus, Two-Dimensional Magnetic Recording (TDMR), Energy-Assisted Magnetic Recording (EAMR), Triple State Actuator (TSA) |
| Environmental Parameters | |
| Min Operating Temperature | 41 °F |
| Max Operating Temperature | 140 °F |
| Min Storage Temperature | -40 °F |
| Max Storage Temperature | 158 °F |
| Shock Tolerance (operating) | 50 g @ 2 ms half-sine wave |
| Shock Tolerance (non-operating) | 250 g @ 2 ms half-sine wave |
| Vibration Tolerance (operating) | 0.67 g @ 5-500 Hz |
| Vibration Tolerance (non-operating) | 1.04 g @ 2-200 Hz |
| Width | 4 in |
| Depth | 5.8 in |
| Height | 1 in |
| Weight | 24.34 oz |
| Expansion & Connectivity | |
| Interfaces | 1 x SATA 6 Gb/s |
| Compatible Bay | 3.5″ |
| Performance | |
| Drive Transfer Rate | 600 MBps (external) |
| Internal Data Rate | 262 MBps |
| Average Latency | 4.16 ms |
| Spindle Speed | 7200 rpm |
| Reliability | |
| MTBF | 2,500,000 hours |
| 24×7 Operation | Yes |
| Non-Recoverable Errors | 1 per 10^15 |
| Load / Unload Cycles | 6,00,000 |
| Power | |
| Power Consumption | 6.5 Watt (typical) ¦ 5.6 Watt (idle) |
| Manufacturer Warranty | |
| Service & Support | Limited warranty – 5 years |
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Waking up the robots...
Fetching your gear.