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Silver 3.5 inch bare hard drive with green circuit board visible underneath

Seagate

Seagate ST31000340NS BarraCuda ES.2 1TB 7200 RPM 32MB SATA 3.0Gb/s 3.5" internal hard drive

SKU CH-XF33-NW3G3 MPN ST31000340NS

Enterprise-grade 1 TB 7200 RPM SATA drive with 32 MB cache built for 24×7 operation

  • Total capacity1 TB
  • Interface typeSATA 3.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeEnterprise
  • Rotational speed7,200 RPM
  • 1TB capacity for enterprise storage
  • 7200 RPM spindle speed for 24x7 operation
  • 32MB cache with SATA 3.0Gb/s interface
  • 16ms average latency for quick data access
  • 33 percent more capacity than previous Barracuda ES

Enterprise Storage Drive

The Seagate BarraCuda ES.2 ST31000340NS is a 1TB 3.5-inch internal hard drive built for 24x7 operation in business-critical environments. It spins at 7200 RPM with a 32MB cache and connects via a SATA 3.0Gb/s interface. Perpendicular recording technology increases data density while reducing moving parts for enhanced reliability.

Compatibility Checklist

Verify that your system has a free 3.5-inch drive bay and a SATA data port running at 3.0Gb/s. The bare-drive package includes no cables, brackets or mounting screws, so confirm you have spares or can source them separately. Ensure your BIOS or operating system supports drives of this capacity without additional software.

Upgrade Path

This model delivers 33 percent more capacity than the earlier Barracuda ES drive while maintaining the same enterprise-grade reliability. OptiCache technology improves performance by up to 45 percent, and SmartAlign eases the transition to Advanced Format 4K sectors. The jump is worth it for arrays needing higher density and sustained throughput in multi-drive deployments.

How it compares

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

Price $128.99
Pricier than about 55% 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 $128.99 per TB
Pricier than about 69% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineBarraCuda ES.2
Model nameST31000340NS
Total capacity1 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Flash memory typeEnterprise
Cache memory32 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.11 mm
Maximum width101.6 mm
Maximum length146.99 mm
Shipping weight0.79 kg
Package size222 × 152 × 76 mm

Questions about this item

What comes with the bare drive ST31000340NS and what must I buy separately?

The drive ships as a bare unit only; you will need to supply your own SATA data cable, SATA power cable and 3.5" mounting screws or tray.

Which capacity version of the BarraCuda ES.2 should I choose for enterprise storage?

This model provides 1TB on a 7200 RPM platform with 32MB cache and SATA 3.0Gb/s interface, the only capacity listed for this part number.

What does the 7200 RPM rating mean once the drive is installed in a server?

It delivers 4.16ms average latency and sustained throughput suitable for 24x7 multi-drive arrays, with rotational-vibration tolerance built for enterprise workloads.

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