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Standard 3.5-inch bare drive with silver aluminium top cover and green circuit board visible underneath

Seagate

Seagate ST3000NM0025 Exos 7E8 3TB 7200 RPM SAS 12Gb/s 128MB Cache 3.5" Internal Hard Drive

SKU CH-T972-FB535 MPN ST3000NM0025

3 TB enterprise SAS hard drive spinning at 7200 RPM with 128 MB cache and 12 Gb/s interface for 24×7 bulk-data workloads

  • Total capacity3 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeHard Drive
  • Rotational speed7,200 RPM

Capacity 3TB

  • 3TB capacity stores large enterprise datasets
  • 7200 RPM spindle delivers fast sequential throughput
  • 128MB cache accelerates frequent read operations
  • 12Gb/s SAS interface enables high-speed host connectivity
  • 550TB/yr workload rating supports continuous 24x7 operation

Enterprise bulk-data drive

The Seagate Exos 7E8 ST3000NM0025 is a 3TB 3.5-inch internal hard drive built for enterprise storage servers and arrays. It spins at 7200 RPM with a 128MB cache and connects through a SAS 12Gb/s interface using 512n sector formatting. The drive is engineered for continuous 24x7 operation with a 550TB per year workload rating and conventional magnetic recording technology.

Suited for RAID and replicated storage

This drive fits administrators deploying high-capacity nearline storage in multi-drive chassis where consistent performance and dual-processor reliability matter. Advanced write caching and a humidity sensor support dense environments. It is not suited for desktop PCs lacking SAS infrastructure or for systems requiring SATA-only connectivity. The bare-drive packaging also assumes the buyer provides mounting hardware.

Deciding specification: SAS 12Gb/s interface

The single specification that decides compatibility is the SAS 12Gb/s interface. The host controller, backplane and cabling must support this protocol; a SATA-only motherboard or HBA cannot communicate with the drive. Verify the storage server or RAID controller accepts 12Gb/s SAS devices before purchase.

How it compares

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

Price $140.99
Pricier than about 58% of the 4,938 comparable items (median $107.99).
Total capacity 3 TB
Higher than about 60% of the 2,372 comparable items (median 2 TB).
Price per TB $47.00 per TB
Cheaper than about 64% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineExos 7E8
Model nameST3000NM0025
Total capacity3 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Flash memory typeHard Drive
Cache memory128 MB
Ports & slots
Interface typeSAS 12Gb/s
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 size169 × 132 × 39 mm

Other versions of this model

3 more in the same range

Questions about this item

How much power does the 7200 RPM SAS 12Gb/s drive draw during continuous 24x7 operation?

The drive is engineered for 24x7 workloads of 550TB per year and includes an on-demand PowerBalance feature for lower power consumption in random read/write environments.

What host interface and connector does the 3.5-inch 12Gb/s SAS drive require to function?

The drive uses a SAS 12Gb/s interface and is compatible with SATA 6Gb/s interfaces in industry-standard formats for integration into RAID multi-drive storage servers and systems.

Will the 512n sector format Exos 7E8 work in a RAID array with older 512e drives?

The drive supports industry-standard formats including 512n, 512e and 4Kn for easy integration into replicated and RAID multi-drive storage servers and systems.

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