Seagate Constellation 1TB 2.5" 7200RPM SATA 6Gb/s 64MB Cache HDD

The Seagate ST91000640NS is a 1TB internal hard drive that uses a 2.5-inch form factor and connects through a SATA 6Gb/s interface. Its spindle rotates at 7200 RPM and works with a 64 MB cache, giving servers steady throughput and consistent access times.

Designed for enterprise workloads, this drive arrives with firmware that is tuned for multi-drive arrays. Whether it is placed in a dense rack server or a dedicated storage shelf, the firmware helps balance performance and reliability when many drives are spinning side by side.

The 15 mm thickness allows data center teams to pack more drives into each chassis, conserving valuable rack space. A mean time between failures of 1.4 million hours supports 24×7 operation, so it fits environments where downtime is not an option.

Administrators who manage virtualization hosts, transactional databases, or large file repositories can drop this model into any bay that accepts a 2.5-inch, 15 mm SATA drive and gain a terabyte of dependable capacity without re-engineering the server layout.

• 1 TB capacity with SATA 6 Gb/s interface
• 7200 RPM rotational speed and 64 MB cache for balanced performance
• 2.5-inch form factor with 15 mm thickness supports high-density chassis
• Mean time between failures rated at 1.4 million hours
• Enterprise firmware optimized for multi-drive environments