WD Ultrastar DC HC555 3.5" 18TB, 7200 RPM, 512MB, 550 WRL, SATA III Hard Drive, Enterprise

The Western Digital Ultrastar DC HC555 is an 18 TB hard drive engineered for enterprise-level applications, including data centers and high-capacity server environments. It utilizes energy-assisted magnetic recording (EAMR) technology to achieve high storage density while maintaining operational efficiency. Designed for sustained 24/7 workloads, this drive incorporates features to ensure data integrity and consistent performance under continuous use. Its construction is suited for multi-drive systems where reliability and high capacity are primary requirements for data storage.

This drive operates at a spindle speed of 7200 RPM and connects via a SATA III interface, providing a data transfer rate of up to 6 Gbit/s. A 512 MB cache buffer assists in managing data flow for read and write operations, contributing to its overall responsiveness. Integrated Rotational Vibration (RV) sensors help mitigate the effects of vibration in dense storage arrays, which is critical for maintaining performance in multi-drive server chassis. End-to-end data protection mechanisms are also included to safeguard data integrity across the entire storage path from the host to the drive.

• 18 TB storage capacity
• 3.5-inch form factor
• SATA III 6 Gbit/s interface
• 7200 RPM spindle speed
• 512 MB buffer size
• 2.5 million hours Mean Time Between Failures (MTBF)
• 550 TB per year workload rate limit
• Designed for 24/7 continuous operation
• Includes Rotational Vibration (RV) sensors
• Supports SE security algorithms
• Intended for server and workstation use
• Measures 101.6 mm x 147 mm x 26.1 mm
• Weighs 679 g