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Silver 3.5 inch enterprise hard drive bare unit

Seagate

Seagate ST4000NM0034 4TB SAS 12Gb/s 7200 RPM 128MB 3.5" internal hard drive

SKU CH-14GB-4GFPJ MPN ST4000NM0034

Enterprise SAS 12Gb/s drive delivers 4TB at 7200 RPM with 128MB cache for 24x7 workloads of 550TB/yr

  • Total capacity4 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory128 MB

Capacity 4TB

  • 4TB capacity stores massive enterprise datasets
  • SAS 12Gb/s interface moves data at high speed
  • 7200 RPM spindle delivers fast random access
  • 128MB cache accelerates read and write bursts
  • Engineered for 24×7 workloads of 550TB per year

Product identity

The Seagate ST4000NM0034 is a 4TB 3.5 inch enterprise hard drive with a SAS 12Gb/s interface. It targets storage arrays and servers that need reliable bulk capacity for unstructured data.

Practical limits of SAS 12Gb/s

The SAS 12Gb/s link sets the maximum bus throughput, but sustained transfer depends on the 7200 RPM platters and 4.16ms average latency. Random I/O is constrained by mechanical seek time, and the 128MB cache can only absorb brief bursts before the physical media becomes the bottleneck.

Capacity and headroom

Four terabytes provides substantial space for archival workloads and RAID sets, while the 550TB per year workload rating supports continuous 24x7 operation. The drive runs out of headroom when sustained write streams exceed the mechanical media rate or when the annualised workload limit is approached.

How it compares

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

Price $230.99
Pricier than about 74% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $57.75 per TB
Cheaper than about 54% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Model nameST4000NM0034
Total capacity4 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory128 MB
Ports & slots
Interface typeSAS 12Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.68 kg
Package size160 × 141 × 38 mm

Other versions of this model

2 more in the same range

Questions about this item

Which capacity version of the ST4000NM0034 should I choose for an enterprise RAID array?

The ST4000NM0034 is offered as a single 4TB model. Its 7200 RPM spindle and 128MB cache are tuned for 24x7 workloads rated at 550TB per year, making this capacity the intended choice for high-density RAID storage.

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

At 7200 RPM the drive achieves an average latency of 4.16ms, enabling fast random and sequential read/write performance for bulk unstructured data access in enterprise environments.

How does the SAS 12Gb/s interface limit real-world throughput?

The SAS 12Gb/s interface caps the maximum burst transfer rate at 12Gb/s; sustained throughput will be governed by the 7200 RPM mechanical speed and the 128MB cache.

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