HDD Western Digital 20 TB 3.5 inch Serial ATA III Ultrastar DC HC555

The Western Digital Ultrastar DC HC555 is a 3.5" internal hard drive offering 20 TB of storage in a Serial ATA III form factor. Designed for continuous, multi-user data center environments, it combines 7200 RPM spindle speed, a 512 MB buffer, and enterprise-class design elements to support data-intensive workloads with proven reliability.

Advantages

This drive uses energy-assisted perpendicular magnetic recording (ePMR) and a Triple-Stage Actuator (TSA) to increase areal density and maintain precise head control, enabling high capacity with low power consumption. HelioSeal® helium sealing reduces internal turbulence for improved power efficiency. Built on a platform deployed in thousands of data centers, the Ultrastar DC HC555 offers field-proven reliability and a projected MTBF of 2.5 million hours, plus sensors and dynamic fly height technology to mitigate vibration and shock.

Suitable for

• Enterprise-scale archival and nearline storage
• High-density server and storage arrays
• Backup and disaster recovery repositories
• Multi-user data center workloads and cold storage

Key specifications

• Capacity: 20 TB (20,000 GB)
• Form factor: 3.5 inch
• Interface: Serial ATA III (SATA 6 Gb/s)
• Rotational speed: 7200 RPM
• Cache: 512 MB buffer
• MTBF: 2,500,000 hours (projected)
• Weight: 0.69 kg

How to use

Install the Ultrastar DC HC555 into a compatible 3.5" drive bay or tray and connect it to a SATA III interface using an appropriate data and power cable. Configure the drive within your operating system or storage controller according to your server or array vendor guidelines. For RAID or multi-drive configurations, follow the controller manufacturer's recommendations for initialization, formatting, and rebuild procedures.

Recommendations

Use this drive in systems with adequate cooling and vibration control, and ensure firmware and storage controller compatibility before large-scale deployment. For optimal longevity in data center environments, monitor drive health via SMART and adhere to the host system's environmental and power specifications.