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Refurbished 3.5 inch bare SAS hard drive, silver metal casing

Seagate Refurbished

Seagate BarraCuda ES.2 ST31000640SS 1TB 7200 RPM 16MB SAS 3Gb/s 3.5" internal hard drive

SKU CH-FJA2-SG17S MPN ST31000640SS

A refurbished 1TB 3.5-inch enterprise hard drive with 7200 RPM, 16MB cache and SAS 3Gb/s interface for 24x7 operation

  • Total capacity1 TB
  • Interface typeSAS 3Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • Enterprise-class reliability built for 24x7 operation
  • 1TB capacity delivers 33 percent more storage than previous ES drive
  • SAS 3Gb/s interface provides 135 percent average performance boost over SATA
  • PowerTrim technology improves GB per watt by 55 percent and cuts power use by 20 percent
  • 7200 RPM with 16MB cache achieves 8.5ms average seek time

Enterprise storage drive

The Seagate BarraCuda ES.2 ST31000640SS is a 1TB 3.5-inch internal hard drive built for enterprise storage. It spins at 7200 RPM with a 16MB cache and connects through a SAS 3Gb/s interface. The drive is rated for 24x7 operation in high spindle-density environments.

SAS host and multi-drive firmware

Installation requires a SAS host bus adapter or controller; the drive will not work on a SATA-only port. Its SAS interface provides improved data integrity and reduces integration complexity in multi-drive arrays. Multi-drive firmware maximises system availability while rotational vibration tolerance maintains consistent performance across densely packed bays.

Suited for tier 2 enterprise arrays

This drive suits administrators expanding or repairing SAS-based tier 2 storage, backup targets or reference data archives where 24x7 reliability matters. Buyers who need a SATA connection, larger capacity per spindle, or a consumer desktop drive should look elsewhere.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $131.99
Pricier than about 56% of the 4,938 comparable items (median $107.99).
Total capacity 1 TB
Lower than about 60% of the 2,372 comparable items (median 2 TB).
Price per TB $131.99 per TB
Pricier than about 70% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineBarraCuda ES.2
Model nameST31000640SS
Total capacity1 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Average seek time8.5 ms
Mean write time9.5 ms
Mean latency4.16 ms
Storage
Cache memory16 MB
Ports & slots
Interface typeSAS 3Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.11 mm
Maximum width101.6 mm
Maximum length146.99 mm
Shipping weight0.73 kg
Package size170 × 132 × 36 mm

Questions about this item

How does the 7200 RPM spindle speed affect sustained write performance?

The 7200 RPM speed combined with 16MB cache yields a 9.5ms average write time, limiting sustained throughput to the SAS 3Gb/s interface ceiling under continuous load.

What are the heat and power characteristics during 24x7 operation?

PowerTrim technology cuts overall drive power by 20 percent and improves GB per watt by 55 percent versus the prior Barracuda ES, reducing heat output in always-on arrays.

Which host interface must my system provide for this drive to work?

A SAS 3Gb/s backplane or HBA is required; the drive uses a SAS connector and will not operate on a SATA-only controller.

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