WD Ultrastar HC555 3.5" 16TB, 7200 RPM, 512MB, 550 WRL, SATA III Hard Drive, Enterprise

The Western Digital Ultrastar HC555 hard disk drive is engineered for high-intensity workloads within multi-user data center environments. It utilizes HelioSeal technology, which seals helium inside the drive to enable higher storage capacities while reducing power consumption and internal turbulence. This model also incorporates energy-assisted perpendicular magnetic recording (ePMR) to increase areal density, supporting its substantial capacity in a standard 3.5-inch form factor. Its construction is specified for continuous, 24/7 operation in enterprise-grade systems.

Performance is managed by a 7200 RPM spindle speed and a 512 MB cache, which facilitate efficient data access and transfer. To maintain data integrity in multi-drive arrays, integrated Rotational Vibration (RV) sensors are included to mitigate the effects of system-induced vibration. The drive's Triple-Stage Actuator (TSA) enhances head-positioning accuracy, a necessary component for high-density recording. This HDD is rated for a workload of up to 550 TB per year and has a Mean Time Between Failures (MTBF) of 2.5 million hours, indicating its durability for demanding applications.

• Storage capacity of 16384 GB
• 3.5-inch form factor
• SATA interface with a 6 Gbit/s transfer rate
• 7200 RPM spindle speed
• 512 MB storage drive buffer size
• Sustained read/write speed of 269 MB/s
• Workload rate limit of 550 TB per year
• Mean Time Between Failures of 2.5 million hours
• Designed for 24/7 data center operation
• Includes S.M.A.R.T. monitoring support
• Features rotational vibration (RV) sensors
• Idle power consumption of 5.3 W