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Silver 3.5 inch SATA hard drive with green circuit board visible on underside

Seagate

Seagate ST2000NM0055 2TB 7200 RPM 128MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-9Q67-C4EQ9 MPN ST2000NM0055

A 3.5-inch enterprise hard drive delivering 2 TB of CMR storage at 7200 RPM with a 128 MB cache and SATA 6.0 Gb/s interface

  • Total capacity2 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeSLC
  • Rotational speed7,200 RPM
  • Cache memory128 MB

Capacity 2TB

  • Enterprise CMR technology maximises storage density per bay
  • Advanced Write Caching boosts random write performance by up to 100%
  • Engineered for 24x7 workloads rated at 550TB per year
  • Dual processors with ramp load and humidity sensor ensure consistent operation
  • On-demand PowerBalance feature optimises power draw in read/write environments

Enterprise 2 TB CMR drive

The Seagate ST2000NM0055 is a 2 TB 3.5-inch hard drive built for enterprise storage arrays. It spins at 7 200 RPM with a 128 MB cache and uses conventional magnetic recording for consistent performance in multi-drive systems. The drive is engineered for 24 x 7 workloads of 550 TB per year.

SATA 6.0 Gb/s host interface

Verify that your server or RAID controller provides a SATA 6.0 Gb/s port and supports 512n, 512e or 4Kn sector formats. The unit fits standard 3.5-inch bays with maximum dimensions of 147.00 mm length, 101.85 mm width and 26.10 mm height. Ensure your backplane supplies the required 12 V and 5 V rails.

24 x 7 thermal design

Dual processors, ramp-load technology and a top-cover-attached motor keep operating temperatures stable in dense chassis. The on-demand PowerBalance feature reduces power draw during random read/write activity. A humidity sensor maintains optimum performance across varying environmental conditions.

How it compares

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

Price $123.99
Typical for this category: the median of 4,938 items is $107.99.
Total capacity 2 TB
Typical for this category: the median of 2,372 items is 2 TB.
Price per TB $62.00 per TB
Typical for this category: the median of 2,365 items is $62.21 per TB.

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Specifications

Product
Brand nameSeagate
Product lineEnterprise Capacity 3.5
Model nameST2000NM0055
Total capacity2 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Flash memory typeSLC
Cache memory128 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.72 kg
Package size203 × 163 × 114 mm

Other versions of this model

3 more in the same range

Questions about this item

Does the ST2000NM0055 ship with mounting screws, cables or a bracket, or must they be purchased separately?

The drive is supplied as a bare 3.5-inch unit; SATA data and power cables plus any mounting hardware are not included and must be sourced separately.

What distinguishes the 2 TB, 7200 RPM, 128 MB cache model from other capacities in the Enterprise Capacity 3.5 series?

It provides 2 TB of CMR storage with a 128 MB buffer and 7200 RPM spindle speed, matching the series’ 550 TB per year workload rating and Advanced Write Caching for random-write efficiency.

How does the 6.0 Gb/s SATA interface and 4.16 ms latency translate to real-world throughput in a RAID array?

The SATA 6.0 Gb/s link supports the drive’s sustained transfer rates, while 4.16 ms average latency and dual-processor design deliver consistent random I/O performance in multi-drive RAID environments.

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