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Silver 3.5 inch enterprise hard drive with label showing 12TB capacity

Seagate

Seagate ST12000NM0007 Exos X12 12TB 7200 RPM SATA 6.0Gb/s 256MB 3.5" internal hard drive

SKU CH-RZ5H-VJMYK MPN ST12000NM0007

A 12 TB enterprise hard drive with a 7200 RPM spindle, 256 MB cache and a 550 TB yearly workload rating for 24×7 storage arrays

  • Total capacity12 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeSLC
  • Rotational speed7,200 RPM
  • Cache memory256 MB

Capacity 12TB

  • 12 TB capacity scales to 10 PB per 42U rack
  • 261 MB/s transfer rate with 256 MB cache
  • 550 TB yearly workload rated for 24×7 operation
  • 5 million hour MTBF ensures long-term reliability
  • Helium-sealed 3.5" design with PowerChoice efficiency

Seagate Exos X12 12TB SATA Drive

The Seagate Exos X12 is a 12TB 3.5 inch internal hard drive built for enterprise storage systems. It operates at 7200 RPM with a 256MB cache and a SATA 6.0Gb/s interface. The helium-sealed design supports 24x7 operation in servers, JBODs and business NAS environments.

Enterprise Workloads and Compatibility

This drive suits organisations that need high-capacity bulk storage with a 550TB per year workload rating and 2.5 million hour MTBF. It is not intended for desktop PCs or consumer NAS units that cannot sustain enterprise-class duty cycles. Systems requiring a different physical interface or form factor cannot use this SATA 3.5 inch device.

261 MB/s Sustained Transfer Rate

Advanced Write Caching helps deliver up to 261 MB/s data transfer rates for heavy application usage. This throughput figure is the key metric for deciding if the drive matches your storage array performance requirements.

How it compares

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

Price $277.99
Pricier than about 80% 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 $23.17 per TB
Cheaper than about 91% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineExos X12
Total capacity12 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Storage
Flash memory typeSLC
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 length147 mm
Shipping weight0.71 kg
Package size154 × 108 × 38 mm

Questions about this item

How much heat and power should I expect from the 7200 RPM helium drive when it runs 24×7?

The 3.5-inch helium design and PowerChoice feature keep power draw low and heat manageable during continuous operation, while the 2.5 million hour MTBF rating reflects reliability under sustained load.

My server backplane only has SATA 6.0Gb/s ports — will the Exos X12 connect without an adapter?

Yes, the drive uses a native SATA 6.0Gb/s interface and standard 3.5-inch form factor, so it plugs directly into any SATA backplane or controller without extra hardware.

Will the 256 MB cache and 261 MB/s transfer rate work well with my older 6 Gb/s RAID card?

The 256 MB cache and up to 261 MB/s sustained transfer rate operate fully within the SATA 6.0Gb/s bandwidth, so performance scales to the limit of your existing controller.

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