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Silver 3.5 inch bare hard drive with SATA connectors

Seagate

Seagate Constellation ES ST1000NM0051 1TB 7200 RPM 64MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-1KSC-8E301

Enterprise-class 1TB 3.5" drive with 7200 RPM, 64MB cache, SATA 6.0Gb/s and FIPS-validated encryption for 24×7 operation

  • Total capacity1 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory64 MB
  • Enterprise 24×7 reliability from fifth-generation nearline design
  • 1TB capacity with 7200 RPM for responsive bulk storage
  • 64MB cache buffers bursts for smoother throughput
  • SATA 6.0Gb/s interface fits standard desktop bays
  • Hardware encryption with FIPS validation protects data at rest

Enterprise Nearline Storage

The Seagate Constellation ES ST1000NM0051 is a 1TB 3.5-inch internal hard drive built for continuous operation. It spins at 7200 RPM with a 64MB cache and connects via SATA 6.0Gb/s. The drive includes hardware encryption validated to FIPS standards.

Suited for Always-On Workloads

This drive targets servers, NAS appliances and surveillance arrays that run 24×7 and value the FIPS-validated self-encrypting option. It is not for buyers who need the low latency or high IOPS of solid-state storage, nor for ultra-quiet desktop builds where rotational noise is a concern.

FIPS-Validated Self-Encryption

The decisive specification is the hardware-based encryption that meets FIPS validation, allowing the drive to satisfy regulatory data-protection requirements without software overhead. If your deployment does not mandate FIPS-compliant encryption, a standard nearline drive may cover the same capacity and speed at lower cost.

How it compares

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

Price $76.99
Cheaper than about 60% 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 $76.99 per TB
Pricier than about 56% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineConstellation ES
Model nameST1000NM0051
Total capacity1 TB
Performance
Rotational speed7,200 RPM
Storage
Cache memory64 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

What size drive bay does the 3.5" form factor require?

The drive fits a standard 3.5-inch internal bay in a desktop chassis or server enclosure.

Which cables connect the SATA 6.0Gb/s interface, and what is the common alignment mistake?

Use a SATA data cable and a SATA power cable; the L-shaped connectors only seat one way, so forcing them upside down bends pins.

When should the 64MB cache or the drive itself be considered for replacement in 24×7 use?

Monitor SMART reallocated-sector counts and throughput drops; enterprise nearline drives typically run five years before preventive replacement.

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