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Silver 3.5 inch bare hard drive with circuit board visible

Seagate

Seagate ST4000NM0095 4TB 7200 RPM 3.5" SAS 12Gb/s 128MB internal hard drive

SKU CH-0EVE-KDKE3 MPN ST4000NM0095

Enterprise 4TB SAS hard drive with 7200 RPM, 128MB cache and CMR technology for 24x7 bulk-data workloads

  • Total capacity4 TB
  • Interface type4Kn SAS
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory128 MB

Capacity 4TB

  • 4TB capacity stores bulk enterprise data
  • 7200 RPM spindle delivers consistent nearline performance
  • 12Gb/s SAS interface integrates with RAID arrays
  • 128MB cache with Advanced Write Caching boosts workload efficiency
  • Engineered for 24x7 operation at 550TB/yr workload rating

Enterprise bulk-data drive

The Seagate ST4000NM0095 is a 4000 GB 3.5 inch hard drive built for enterprise storage servers that run 24x7 workloads of 550 TB per year. It uses conventional magnetic recording technology and dual processors to deliver reliable access to unstructured data in dense multi-drive systems. The bare drive suits administrators who need maximum capacity per storage slot.

12 Gb/s SAS 4Kn interface

This model connects through a 12 Gb/s SAS interface with 4Kn sector format and 128 MB cache. The interface determines whether the drive fits your storage server or RAID array; it also supports SATA 6 Gb/s for easy integration into replicated systems. Buyers whose controllers require 512n or 512e sector formats should verify compatibility before purchasing.

Thermals and power in normal use

The drive operates within standard enterprise temperature ranges using ramp load technology and a humidity sensor for consistent performance in all chassis. An on-demand PowerBalance feature lowers power draw during random read and write activity while maintaining throughput. Average latency is 4.16 ms at 7200 RPM, and the 26.10 mm height fits standard 3.5 inch drive bays.

How it compares

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

Price $158.99
Pricier than about 62% 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 $39.75 per TB
Cheaper than about 70% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Model nameST4000NM0095
Total capacity4 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory128 MB
Ports & slots
Interface type4Kn SAS
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.68 kg
Package size166 × 140 × 32 mm

Other versions of this model

2 more in the same range

Questions about this item

How does the 7200 RPM speed affect performance in a real server?

The 7200 RPM spindle delivers an average latency of 4.16ms, providing consistent throughput for 24x7 enterprise workloads rated up to 550TB per year.

What does the 12Gb/s SAS interface limit in practice?

The 12Gb/s SAS link sets the maximum host transfer rate; actual sustained throughput depends on the drive's internal media speed and the controller's queue depth.

Will this 3.5-inch drive fit a standard hot-swap tray?

Yes, it measures 147.00mm long, 101.85mm wide and 26.10mm high, matching the industry-standard 3.5-inch form factor for server bays.

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