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Silver 3.5 inch bare hard drive with exposed circuit board and SATA connectors

Seagate

Seagate Constellation ES.2 ST32000645NS 2TB 7200 RPM 64MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-NEZ6-FAMHB MPN ST32000645NS

A 2TB 3.5" enterprise drive with 7200 RPM, 64MB cache and SATA 6.0Gb/s built for 24x7 server workloads

  • Total capacity2 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory64 MB
  • 2TB capacity stores large enterprise datasets
  • 7200 RPM spindle delivers fast sequential throughput
  • 64MB cache buffers bursts for smooth performance
  • SATA 6.0Gb/s interface enables high-speed host transfers
  • 24×7 nearline design built for continuous operation

Seagate Constellation ES.2 2TB Enterprise Drive

The Seagate Constellation ES.2 ST32000645NS is a 2TB 3.5" internal hard drive built for 24x7 enterprise workloads. It connects via a SATA 6.0Gb/s interface and spins at 7200 RPM with a 64MB cache. The drive uses SAS-based end-to-end data integrity and enhanced error correction for accurate storage. Dual processors and ramp load technology support robust performance in multi-drive environments.

Suits high-capacity bulk data centres

This drive fits high-capacity bulk data centre storage, mainstream enterprise external storage arrays, and backup or restore infrastructures. It also serves centralized surveillance systems needing sustained write performance. Buyers needing faster random access for transactional databases or low-latency application drives should consider solid-state alternatives. Systems requiring a SAS physical interface instead of SATA will need a different model.

2TB capacity with enterprise vibration tolerance

The 2TB capacity handles large sequential datasets, video archives, and backup repositories with enhanced rotational vibration tolerance for consistent multi-drive performance. Average seek time of 8.5ms and write time of 9.5ms set expectations for random I/O latency. Workloads demanding sub-millisecond latency or high IOPS will exceed the mechanical limits of this platform.

How it compares

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

Price $173.99
Pricier than about 64% of the 4,938 comparable items (median $107.99).
Total capacity 2 TB
Typical for this category: the median of 2,372 items is 2 TB.
Price per TB $87.00 per TB
Pricier than about 60% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineConstellation ES.2
Model nameST32000645NS
Total capacity2 TB
Recommended useIdeal for Servers
Performance
Rotational speed7,200 RPM
Average seek time8.5 ms
Mean write time9.5 ms
Mean latency4.16 ms
Storage
Cache memory64 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight1.36 kg
Package size178 × 133 × 38 mm

Questions about this item

Does the ST32000645NS need a SATA 6.0Gb/s port or will an older SATA port work?

The drive uses a SATA 6.0Gb/s interface and is compatible with earlier SATA revisions, operating at the highest speed the host port supports.

Will the 3.5" form factor and 7200 RPM speed fit in my existing server chassis alongside older drives?

It matches the standard 3.5" enterprise form factor and 7200 RPM spindle speed, so it installs in the same drive bays and power connectors as earlier nearline drives.

How can I verify the Constellation ES.2 is performing to its 8.5ms seek and 9.5ms write specifications after installation?

Run a SMART attribute check and a benchmark tool such as CrystalDiskMark; sustained access times near 8.5ms read and 9.5ms write confirm the drive is operating within its rated specifications.

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