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  • Seagate Constellation.2 ST91000640NS 1 TB 7.2K RPM 2.5 inch SATA-6Gb/s Internal Hard Drive
  • Seagate Constellation.2 ST91000640NS 1 TB 7.2K RPM 2.5 inch SATA-6Gb/s Internal Hard Drive
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Seagate ST91000640NS 1TB 7.2K RPM 2.5" 64MB SATA-6GB/s HDD

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Product Description

Seagate ST91000640NS 1TB 7.2k RPM SATA 6Gb/s 2.5" SFF Enterprise Hard Drive

The Seagate ST91000640NS model internal hard drive has a 2.5 inch form factor and a 6Gb/s external data transfer rate. It has a spindle speed of up to 7200 rpm and a 1 TB capacity.

This SFF drive uses a 6Gb/s SATA interface and comes with a 2 year warranty.


Seagate's Constellation.2 series is rated at 1.4 million hours MTBF, geared towards NAS and SAN use, enterprise backup, and media storage. The ST91000640NS Constellation drive includes Workload Management and PowerChoice features - operating power is rated at below 6.4W. Constellation.2 enterprise drives are suited for continuous use at 8760 power-on hours per year.


 Contact us with any questions or to verify this model’s compatibility with your current server or storage array.



Seagate ST91000640NS 1TB 7.2k RPM 64MB 2.5" SATA-6Gb/s HDD

Brand: Seagate
Model: ST91000640NS
MPN: ST91000640NS

Hard Drive Type: Internal Hard Drive
Capacity: 1 TB
Interface: SATA 6Gb/s
Form Factor: 2.5 inch
Spindle Speed: 7200 RPM
Buffer: 64 MB
External Data Transfer Rate: 600 MB/s
Warranty: 2 years


  • Form Factor: 2.5 inch
  • Speed: 7.2K RPM
  • Interface: SATA
  • Manufacturer: Seagate
  • Capacity: 1TB
  • Type: Hard Drive
  • Product Reviews

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    1. small, reliable, good price 5 Star Review

      Posted by on 22nd Jun 2016

      This drive offers enterprise reliability in a 2.5" form factor. I've had no problems using 2 of these drives for backup, this is my 3rd.

      Note this drive is 15mm thick and needs a 12V supply so it won't work in laptops or most external enclosures. I'm using them in Icy Dock mobile racks.