WD Ultrastar DC HC555 3.5" 20TB, 7200 RPM, 512MB, 550 WRL, SATA III Hard Drive, Enterprise

The Western Digital Ultrastar DC HC555 is a 3.5-inch internal hard drive developed for high-density data center and enterprise server applications. It provides a storage capacity of 20 TB, addressing the need for large-scale data management in modern IT infrastructures. Engineered for continuous, 24/7 operation, the drive has a Mean Time Between Failures (MTBF) of 2.5 million hours. Integrated rotational vibration sensors help maintain performance and data integrity in multi-drive server chassis and storage arrays where vibration is a common factor.

Performance is managed by a 7200 RPM spindle speed and a large 512 MB cache, which facilitate efficient data processing. The drive utilizes a SATA interface supporting transfer rates up to 6 Gbit/s, achieving sequential read speeds of 272 MB/s and write speeds of 285 MB/s. An average latency of 4.16 ms further supports its use in demanding sequential data tasks. To ensure data reliability, the drive also incorporates end-to-end data protection mechanisms and has a workload rate limit of 550 TB per year.

• Storage capacity of 20 TB
• Standard 3.5-inch form factor
• SATA interface with a 6 Gbit/s transfer rate
• Spindle speed of 7200 RPM
• Onboard cache of 512 MB
• Designed for 24/7 operation
• Idle power consumption of 5.3 W
• Features Secure Erase (SE) security algorithms
• Component for server and workstation use
• Dimensions of 101.6 x 147 x 26.1 mm
• Weight of 690 g