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Silver 3.5 inch internal hard drive with exposed circuit board on underside

Seagate

Seagate Exos X18 ST16000NM001J 16 TB 7200 RPM 3.5" SATA internal hard drive

SKU CH-JW75-JSRYV MPN ST16000NM001J

A 16 TB 3.5" internal hard drive with 7200 RPM and 256 MB buffer for surveillance and storage systems

  • Total capacity16 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Flash memory typeSLC
  • Rotational speed7,200 RPM
  • 16 TB capacity for massive data storage
  • 7200 RPM spindle speed delivers fast sequential throughput
  • 256 MB cache buffer smooths burst workloads
  • SATA 6.0 Gb/s interface ensures broad system compatibility
  • Helium-sealed 3.5" design lowers power draw and acoustic noise

Capacity and Purpose

The Seagate Exos X18 ST16000NM001J is a 16 TB hard drive built for continuous operation in video surveillance systems and storage arrays. Its 7200 RPM spindle and 256 MB buffer serve workloads that write large sequential streams around the clock.

Build Integration

The 3.5 inch form factor fits standard drive bays and the SATA 6.0Gb/s interface connects directly to motherboard or controller ports without extra adapters. Hot-plug support lets administrators swap drives while the system stays online, reducing downtime in multi-bay enclosures.

Sustained Load Behaviour

A 7200 RPM spindle combined with a 256 MB cache maintains steady throughput during long recording or archival sessions. The 512e/4Kn disk format preserves compatibility with existing storage controllers while supporting modern sector addressing for large volumes.

How it compares

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

Price $279.99
Pricier than about 81% of the 4,938 comparable items (median $107.99).
Total capacity 16 TB
Higher than about 92% of the 2,372 comparable items (median 2 TB).
Price per TB $17.50 per TB
Cheaper than about 94% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Model nameST16000NM001J
Total capacity16 TB
Performance
Rotational speed7,200 RPM
Storage
Flash memory typeSLC
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.79 kg
Package size229 × 152 × 76 mm

Questions about this item

What is the spindle speed that defines the sustained throughput ceiling of the ST16000NM001J?

The spindle speed is 7200 RPM, which sets the mechanical limit for sustained data transfer on this 16 TB drive.

Does the 3.5 inch Exos X18 support hot-plug operation so it can be swapped without shutting down a storage system?

Yes, the drive is hot-pluggable, allowing removal or insertion while the host system remains powered on.

Which host interface must the system provide for this 16 TB model to function?

The drive requires a SATA 6.0Gb/s port, also labelled SATA/600, on the motherboard or controller.

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