WD Ultrastar DC HC550 WUH721818ALE6L4 / Hard drive / 18TB / internal / 3.5" / SATA 6Gb/s / 7200 rpm / buffer: 512 MB | 0F38459
WD Ultrastar DC HC550 WUH721818ALE6L4 / Hard drive / 18 TB / internal / 3.5" / SATA 6Gb/s / 7200 rpm / buffer: 512 MB | 0F38459
Description
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 18TB 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.
WD Ultrastar DC HC550 WUH721818ALE6L4 / Hard drive | 0F38459
Special Features
- Industry's first Energy-Assisted Magnetic Recording technology
- Industry's first Triple Stage Actuator
- Leading HelioSeal technology
- Reliable, field-proven design across five generations
- HelioSeal design delivers power efficiency (Watts/TB)
- 2.5M hours MTBF rating
Product features
- 18ТВ, enabled by EAMR
Provides 29% more capacity than 14TB helium-filled drives. - Ultra-low Watts per Terabyte (W/TB)
21% lower idle W/TB than 14TB Ultrastar helium-filled drives. - Triple Stage Actuator and Two-Dimensional Magnetic Recording (TDMR) technology
More accurate head positioning, especially in multi-drive environments, for better performance and data integrity. - Rotational Vibration Safeguard (RVS)
Maintains drive performance in high rotational vibration environments and multi-drive systems. - Media Cache Plus architecture
Better random write performance. - SATA 6Gb/s & SAS 12Gb/s
Provides compatibility with high-performance data centers. - 512MB cache buffer
Improves response time and data management. - Dual Safe, RSA-signed firmware
Retains previous firmware version for safe firmware updates, verified with an RSA signature. - 2.5M hours MTBF and 0.35% AFR
Unsurpassed reliability rating for Capacity Enterprise HDD for fewer failures/less service needs.
Product Specification
| Device Type | Hard drive - internal |
| Capacity | 18 TB |
| 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) |
| Width | 101.6 mm |
| Depth | 147 mm |
| Height | 26.1 mm |
| Weight | 690 g |
| Drive Transfer Rate | 600 MBps (external) |
| Internal Data Rate | 262 MBps |
| Average Latency | 4.16 ms |
| Spindle Speed | 7200 rpm |
| MTBF | 2,500,000 hours |
| 24x7 Operation | Yes |
| Non-Recoverable Errors | 1 per 10^15 |
| Load / Unload Cycles | 600,000 |
| Interfaces | 1 x SATA 6 Gb/s |
| Compatible Bay | 3.5" |
| Power Consumption | 6.5 Watt (typical) ¦ 5.6 Watt (idle) |
| Service & Support | Limited warranty - 5 years |
| Min Operating Temperature | 5 °C |
| Max Operating Temperature | 60 °C |
| Min Storage Temperature | -40 °C |
| Max Storage Temperature | 70 °C |
| 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 |
