64MB Cache Hard Drive

ST91000640NS Overview

The Seagate ST91000640NS is a 1 TB enterprise‑grade internal hard disk drive from the Constellation.2 family, engineered for storage environments where reliability, capacity, and efficiency are essential. Built in a compact 2.5‑inch form factor with a SATA III (6 Gbps) interface and a 7200 RPM spindle speed, this drive strikes a balance between performance and space‑saving design — making it an ideal option for dense server applications, rackmount systems, and storage arrays that need robust storage without excessive size.
It also includes reliability technologies like advanced error management and rotational vibration tolerance, enabling continuous 24×7 operation with a mean time between failures (MTBF) of around 1.4 million hours — a hallmark of its enterprise‑focused design.