WD 18TB Ultrastar DC HC550 SATA HDD 7200 RPM Class SATA 6 Gb/s 512MB Cache 3.5"

Designed with a workload rating up to 550TB per year, 10X desktop rating (Workload rate is defined as the amount of data transferred to or from the hard drive; Workload Rate is annualized (TB transferred X (8760/ recorded power on hours); Workload Rate will vary depending on your hardware and software components and configurations
Up to 2.5M hours MTBF
Five generations of HelioSeal technology (10TB and above)
Rotational Vibration Safeguard (RVS) technology for vibration protection

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Availability:: Coming Soon
Product Code:: 0F38459
Brand:: Western Digital

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From the manufacturer

Enterprise-class Hard Drives

Ultrastar SATA Series

Ultrastar hard drives feature up to 10 times the workload rating* of desktop drives and employ advanced technologies for enterprise-class reliability, power efficiency and performance. Designed from the ground up to be an ultra-robust storage device, Ultrastar drives are the perfect solution for your business.

*as compared to 55TB/yr workload rating on desktop-class drives

Designed with a workload rating up to 550TB per year
Up to 2.5M hours MTBF
5 generations of HelioSeal technology (in 10TB and above models)
RVS technology for vibration protection
RAID-specific time-limited error recover (TLER)


High workload rating Delivering dependable performance to any storage environment, Ultrastar hard drives are designed with a workload rating* up to 550TB per year, up to 10 times the rating for desktop drives. Ultrastar drives employ advanced technologies for enterprise-class reliability, power efficiency and performance. *as compared to 55TB/yr workload rating on desktop-class drives	Enterprise-class storage to rely on With up to 2.5 million hours MTBF, Ultrastar hard drives deliver reliability and durability, are built for yearly operation (24x7x365) within the most demanding storage environments, and are backed with a 5 year limited warranty.	HelioSeal Technology Featured in over 30 million Western Digital hard drives shipped, HelioSeal technology (on 10TB drives and above) allows for higher capacities and less turbulence on large storage arrays. And now on its 5th generation design, HelioSeal technology is field-tested and proven to delivery high capacity, reliability, and power efficiency you can trust.


Vibration Protection Enhanced Rotational Vibration Safeguard (RVS) technology uses sophisticated electronics to monitor the drive and correct linear and rotational vibrations in real time for improved performance versus traditional desktop drive in high vibration environments.	Dual-stage Actuator Technology Ultrastar drives feature a dual-stage actuator head positioning system for a high degree of accuracy. The primary stage provides course displacement while the secondary stage uses piezoelectric motion to fine tune the head positioning to a higher degree of precision.	Dynamic fly height technology Each read-write head’s fly height is adjusted in real time to ensure consistent performance for reduced errors and optimized reliability.