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Silver 3.5 inch bare hard drive with exposed circuit board and label showing Seagate IronWolf Pro 12TB

Seagate

Seagate IronWolf Pro 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" ST12000NE0007

SKU CH-2BHG-ST81Z MPN ST12000NE0007

12 TB 7200 RPM SATA drive with 256 MB cache, AgileArray NAS optimisation, RV sensors and 300 TB/year workload rating

  • Total capacity12 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • 12 TB capacity stores large media libraries and backups
  • 7200 RPM with 256 MB cache delivers responsive multi-user NAS performance
  • AgileArray technology balances dual planes and optimises RAID in multi-bay enclosures
  • IronWolf Health Management monitors drive condition and Rescue Data Recovery covers 2 years with 90 % in-house success
  • 300 TB per year workload rate and 1.2 M hours MTBF support 24 x 7 operation

Purpose-built NAS storage

The Seagate IronWolf Pro ST12000NE0007 is a 12TB 3.5-inch internal hard drive spinning at 7200 RPM with a 256MB cache and a SATA 6.0Gb/s interface. It is engineered for always-on, multi-bay NAS enclosures and carries a 1.2M-hour MTBF rating alongside a workload limit of 300TB per year. The bare-drive packaging suits system integrators and IT professionals deploying or expanding network-attached storage arrays.

Ideal for RAID arrays.

This drive targets users who need sustained 24x7 operation with rotational vibration sensors and AgileArray firmware for dual-plane balancing in RAID configurations. It includes IronWolf Health Management and two years of Seagate Rescue Data Recovery service with a 90% in-house success rate. Builders of laptops, external enclosures without active cooling, or silent desktop PCs should look elsewhere, as the 7200 RPM spindle and 26.11mm height demand proper NAS-class airflow and mounting.

The 300TB annual workload rating defines the fit

A maximum workload of 300TB per year is the single figure that determines whether this drive matches the intended environment. Arrays that routinely exceed this write volume — such as heavy video surveillance ingest or continuous database replication — need a higher-rated enterprise model. Workloads staying below this threshold, including typical small-business file shares, backup targets, and media libraries, align with the drive’s design limits and 5-year limited warranty coverage.

How it compares

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

Price $291.99
Pricier than about 82% of the 4,938 comparable items (median $107.99).
Total capacity 12 TB
Higher than about 90% of the 2,372 comparable items (median 2 TB).
Price per TB $24.33 per TB
Cheaper than about 90% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineIronWolf Pro
Model nameST12000NE0007
Total capacity12 TB
Recommended useEnterprise NAS Hard Drives
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.11 mm
Maximum width101.85 mm
Maximum length146.99 mm
Shipping weight0.70 kg
Package size163 × 142 × 38 mm

Questions about this item

When will the 256MB cache or 7200 RPM mechanism need replacement?

The drive is rated for a 1.2M hour MTBF and a 300TB per year workload, so the cache and spindle are designed to last through that service life.

What limit appears first during continuous 24x7 operation?

The 300TB annual workload rating is the first ceiling you hit under sustained multi-bay NAS use.

How much noise, heat or power does the 3.5 inch 7200 RPM drive produce all day?

Rotational vibration sensors and AgileArray power management keep vibration and heat controlled during always-on operation.

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