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Silver 3.5-inch SATA hard drive bare unit

Seagate

Seagate Exos X14 ST12000NM0248 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-AX72-P1DTM MPN ST12000NM0248

Enterprise-grade 12 TB 3.5" SATA hard drive spins at 7200 RPM with 256 MB cache for hyperscale storage workloads

  • 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
  • 12TB capacity for massive enterprise datasets
  • 7200 RPM spindle speed for rapid data access
  • 256MB cache buffer accelerates read and write operations
  • SATA 6.0Gb/s interface ensures broad system compatibility
  • Self-encrypting drive with FastFormat 512e/4Kn protects data at rest

Purpose-built enterprise storage

The Seagate Exos X14 ST12000NM0248 delivers 12TB of capacity in a 3.5-inch form factor for hyperscale and data-centre workloads. Its 7200 RPM spindle and 256MB cache support sustained large-file transfers over a SATA 6.0Gb/s interface. The drive is designed for environments that require high areal density and consistent throughput.

Thermals, noise and power

Enterprise helium-sealed construction reduces internal friction, helping the drive run cooler and quieter than conventional air-filled units at the same spindle speed. The SED model with FastFormat 512e/4Kn adds hardware encryption without measurable latency overhead. Power draw scales with the heavy sequential workloads this drive targets.

Build integration

A standard SATA data and power connection is all the drive requires; no special controller or cabling is needed beyond what a typical server backplane provides. The 3.5-inch form factor fits existing hot-swap trays and frees up 2.5-inch bays for other devices. Bare-drive packaging means mounting screws and rails are sourced separately.

How it compares

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

Price $354.99
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 $29.58 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 lineExos
Model nameST12000NM0248
Total capacity12 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency6Gb/s
Storage
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.91 kg
Package size203 × 102 × 51 mm

Questions about this item

How do I install the 3.5" SATA drive and what step do people often miss?

Mount the drive in a 3.5" bay, connect the SATA data and power cables, then enable the SATA port in BIOS so the 12TB volume appears.

What maintenance or replacement will the Exos X14 need later?

No scheduled maintenance is required; replace the drive only if SMART attributes report reallocated sectors or the 7200 RPM motor develops noise.

What limit appears first during sustained writes on this 12TB model?

The 256MB cache absorbs bursts, then the 7200 RPM platter speed caps sustained throughput at the SATA 6.0Gb/s interface ceiling.

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