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Silver 3.5 inch bare internal hard drive with exposed circuit board

Seagate

Seagate ST8000NM0055 8TB 3.5" SATA 7200RPM 256MB internal hard drive

SKU CH-FT0W-RJF0X MPN ST8000NM0055

An 8TB 3.5-inch enterprise hard drive spinning at 7200RPM with a 256MB cache and SATA 6.0Gb/s interface for bulk-data storage

  • Total capacity8 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeSLC
  • Rotational speed7,200 RPM

Capacity 8TB

  • 8 TB capacity stores massive datasets in one slot
  • 7200 RPM spindle delivers fast sequential throughput
  • 256 MB cache absorbs burst write workloads
  • SATA 6.0 Gb/s interface fits standard server backplanes
  • Self-encrypting drive with Instant Secure Erase protects data at rest

Enterprise bulk-data capacity

The Seagate ST8000NM0055 is an 8TB 3.5-inch enterprise hard drive built for bulk-data applications. It uses 7200 RPM spindle speed and a 256MB cache on a SATA 6.0Gb/s interface. The six-disk design delivers 33% more storage in the same slot. It is suited for storage arrays, backup targets and archival workloads that prioritise capacity over latency.

Compatibility checks

Verify that your system has a free 3.5-inch drive bay and a SATA data and power connection. The drive measures 147.00mm long, 101.85mm wide and 26.10mm high, so confirm clearance in compact chassis. Ensure your host controller supports SATA/600 for full throughput. This is a bare OEM drive without cables or mounting hardware.

Thermals and power

Enterprise drives run continuously, so provide adequate airflow across the 3.5-inch form factor. The 7200 RPM spindle and six platters generate more heat than lower-speed models. PowerChoice technology helps manage draw during idle periods. Self-encrypting drive hardware and Instant Secure Erase add security without a measurable performance penalty. Expect typical enterprise acoustic levels under sustained loads.

How it compares

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

Price $236.99
Pricier than about 75% of the 4,938 comparable items (median $107.99).
Total capacity 8 TB
Higher than about 80% of the 2,372 comparable items (median 2 TB).
Price per TB $29.62 per TB
Cheaper than about 83% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineEnterprise Capacity 3.5
Model nameST8000NM0055
Total capacity8 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Flash memory typeSLC
Cache memory256 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 weight0.79 kg
Package size191 × 137 × 38 mm

Other versions of this model

2 more in the same range

Questions about this item

What comes in the box and what cables or brackets must be bought separately?

The drive ships as a bare 3.5-inch unit without SATA data or power cables, mounting screws or a tray; those items must be sourced separately.

Which version or capacity of the Enterprise Capacity 3.5 series should I choose?

This model is the 8TB variant with 7200 RPM, 256MB cache and SATA 6.0Gb/s; other capacities in the same series differ in storage size but share the same interface and form factor.

What does the 7200 RPM spindle speed mean for real-world throughput in a desktop or server?

The 7200 RPM rotation yields an average latency of 4.16ms and supports sustained transfers up to the SATA 6.0Gb/s link limit, making it suited for bulk-data workloads in enterprise storage arrays.

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