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

This internal hard drive is engineered for data center environments, providing 18 TB of storage capacity for high-intensity, 24/7 multi-user workloads. The drive's enclosure utilizes HelioSeal technology, where helium is used to reduce internal air drag on the platters, contributing to lower power consumption and improved operational stability. Integrated rotational vibration (RV) sensors are included to mitigate the effects of vibration in dense, multi-drive server chassis, which helps maintain consistent performance.

The drive operates at a spindle speed of 7200 RPM and includes a 512 MB buffer to facilitate data handling. It connects via a SAS interface capable of transfer rates up to 12 Gbit/s, delivering sustained read and write speeds of 269 MB/s. For long-term reliability, it is rated for a workload of 550 TB per year and has a Mean Time Between Failures (MTBF) of 2.5 million hours. The unit supports S.M.A.R.T. monitoring to provide drive health status and diagnostics.

• Provides 18 TB of storage capacity
• Utilizes a 3.5-inch form factor
• Connects via a SAS 12 Gbit/s interface
• Operates at a 7200 RPM spindle speed
• Includes a 512 MB buffer size
• Achieves an average latency of 4.16 ms
• Consumes 5.0 W of power during idle operation
• Supports Secure Erase (SE) for data sanitization
• Engineered for continuous 24/7 operation
• Designed for use in data center systems