WD Ultrastar DC HC555 3.5" 12TB, 7200 RPM, 512MB, 550 WRL, SATA III Hard Drive, Enterprise

The Western Digital Ultrastar DC HC555 is an internal hard drive engineered for data center and enterprise storage systems. With a 12 TB capacity, it addresses large-scale data requirements using energy-assisted perpendicular magnetic recording (PMR) technology. It utilizes a hermetically sealed, helium-filled HelioSeal design to reduce internal turbulence and power consumption. Integrated rotational vibration sensors help maintain performance and data integrity in dense, multi-drive server chassis, ensuring operational stability for continuous workloads.

Performance is delivered through a 7200 RPM spindle speed, a 512 MB cache, and a SATA 6 Gbit/s interface. This configuration supports sustained read and write speeds of up to 269 MB/s, facilitating efficient data access. The drive is rated for a 550 TB per year workload and has a Mean Time Between Failures (MTBF) of 2.5 million hours. It is specified for 24/7 operation, making it a component for applications where high availability is a primary concern.

• 12 TB storage capacity
• 3.5-inch form factor
• SATA interface with 6 Gbit/s transfer rate
• 7200 RPM spindle speed
• 512 MB cache buffer
• Sustained read and write speeds up to 269 MB/s
• 2.5 million hours Mean Time Between Failures (MTBF)
• 550 TB per year workload rate limit
• Designed for 24/7 operation in data center environments
• Includes rotational vibration (RV) sensors
• Supports S.M.A.R.T. monitoring
• Measures 101.6 x 147 x 26 mm