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Silver 3.5 inch internal hard drive with green label

Seagate

Seagate ST12000VN0008 IronWolf 12TB 7200 RPM 256MB SATA 3.5" internal hard drive

SKU CH-15XW-TMBZ8 MPN ST12000VN0008

A 12 TB 3.5" SATA drive built for 24x7 NAS use with 7200 RPM, 256 MB cache, CMR recording and AgileArray RAID optimisation

  • Total capacity12 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeHard Drive
  • Recording methodCMR
  • Rotational speed7,200 RPM

Capacity 12TB

  • 12 TB capacity stores large media libraries
  • 7200 RPM spindle delivers fast sequential throughput
  • 256 MB cache buffers heavy multi-user workloads
  • AgileArray firmware balances dual-plane vibration for RAID stability
  • IronWolf Health Management monitors drive condition to prevent data loss

Built for multi-bay NAS

The IronWolf 12TB 3.5-inch drive uses a SATA 6.0Gb/s interface and spins at 7200 RPM with 256MB cache. CMR recording technology and AgileArray firmware enable dual-plane balancing and RAID optimisation across multi-bay enclosures. Rotational vibration sensors sustain performance when several drives operate together. Designed for 24x7 operation in network-attached storage systems.

Mechanical readiness for rack duty

A 26.11 mm height, 101.85 mm width and 146.99 mm length fit standard 3.5-inch drive trays and hot-swap carriers. The SATA data and power connectors face the rear for clean cabling in dense chassis. AgileArray power management reduces spin-up current peaks, easing the load on shared power supplies during simultaneous drive starts. RV sensors compensate for chassis-borne vibration without extra mounting hardware.

Step up from lighter NAS drives

The 180 TB per year workload rating and 1M-hour MTBF exceed desktop-class and entry-level NAS drives, making the jump worthwhile when arrays run continuous backup, media streaming or virtualisation workloads. IronWolf Health Management adds preventive monitoring, intervention and recovery tools that basic drives lack. Not suited for single-bay appliances that cannot use RV sensing or for systems needing SSD latency.

How it compares

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

Price $355.99
Pricier than about 87% 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 $29.67 per TB
Cheaper than about 83% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineIronWolf
Model nameNE-ST12000VN0008
Part numberNE-ST12000VN0008
Total capacity12 TB
Recommended useFor NAS systems
Performance
Rotational speed7,200 RPM
Storage
Flash memory typeHard Drive
Recording methodCMR
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 weight0.68 kg
Package size152 × 102 × 32 mm

Other versions of this model

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Questions about this item

What does the SATA 6.0Gb/s interface mean for actual transfer speeds?

The SATA 6.0Gb/s link sets a theoretical ceiling of 6 Gb/s; sustained reads and writes from the 7200 RPM platters typically run below that limit, so the drive will not saturate the bus in everyday NAS workloads.

What physical space does the 3.5" drive need in a NAS bay?

The unit measures 146.99 mm long, 101.85 mm wide and 26.11 mm high, so the bay must accommodate those maximum dimensions plus clearance for power and data cables.

How is the drive installed in a multi-bay NAS, and what step is often missed?

Mount the drive using the 3.5" screw holes, connect SATA data and power, then enable IronWolf Health Management in the NAS firmware so the drive can report its health and rotational-vibration data to the array manager.

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