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

The Western Digital Ultrastar DC HC555 is an enterprise-class hard drive providing 16 TB of storage capacity for data center applications. It utilizes a 3.5-inch form factor and connects via a SAS interface with a 12 Gbit/s transfer rate, suitable for high-throughput server and workstation environments. The drive incorporates HelioSeal technology, which seals helium inside the enclosure to reduce disk flutter and lower power consumption. This design supports higher storage densities and contributes to the drive's operational efficiency under continuous workloads.

Performance is delivered through a 7200 RPM spindle speed and a 512 MB cache, facilitating responsive data access with an average latency of 4.16 ms. The drive is built for reliability in 24/7 operational settings, featuring integrated Rotational Vibration (RV) sensors to maintain performance in multi-drive systems. Its construction 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 suitability for mission-critical storage tasks. Energy-assisted perpendicular magnetic recording (ePMR) technology ensures stable write operations.

• 16 TB storage capacity
• 3.5-inch form factor
• SAS interface with 12 Gbit/s transfer rate
• 7200 RPM spindle speed
• 512 MB cache buffer
• Up to 269 MB/s sustained read/write speed
• Engineered for continuous 24/7 operation
• 2.5 million hours Mean Time Between Failures (MTBF)
• 550 TB per year workload rating
• Includes integrated Rotational Vibration (RV) sensors
• Supports Secure Erase (SE) functionality
• Dimensions: 101.6 x 147 x 26.1 mm
• Weight: 679 g