WD Ultrastar HC555 3.5" 12TB, 7200 RPM, 512MB, SAS Hard Drive, Enterprise

The Western Digital Ultrastar DC HC555 is a 12 TB internal hard drive engineered for data center applications and multi-user workloads. It utilizes energy-assisted perpendicular magnetic recording (ePMR) technology to achieve high storage density within a standard 3.5-inch form factor. The drive's HelioSeal design hermetically seals the enclosure with helium, reducing internal turbulence and power consumption. This construction contributes to its operational efficiency and reliability in demanding, 24/7 environments.

This model's performance is supported by a 7200 RPM spindle speed, a 512 MB cache, and a SAS interface capable of 12 Gbit/s transfer rates. It is designed for high-intensity use, with a workload rate limit of 550 TB per year and a Mean Time Between Failures (MTBF) of 2.5 million hours. A Triple-Stage Actuator (TSA) enhances head-positioning accuracy, which is beneficial for data integrity during read and write operations. Integrated rotational vibration sensors help maintain performance in multi-drive server and storage systems.

• Offers a 12 TB storage capacity
• Features a 3.5-inch form factor
• Utilizes a SAS interface with a 12 Gbit/s transfer rate
• Operates at a 7200 RPM spindle speed
• Equipped with a 512 MB cache buffer
• Achieves read speeds up to 269 MB/s
• Provides write speeds up to 257 MB/s
• Rated for a 550 TB per year workload
• Built for 24/7 operation in data center environments
• Includes rotational vibration (RV) sensors
• Supports Secure Erase (SE) security algorithms
• Measures 101.6 x 147 x 26.1 mm