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Seagate Exos X18 16TB 3.5in SATA internal hard drive, silver metal casing

Seagate

Seagate 2TW103-881 16TB 7200 RPM SATA 6.0Gb/s 256MB 3.5in internal hard drive

SKU CH-F7AN-3Q1Q8 MPN 2TW103-881

16 TB helium-sealed CMR drive with 7200 RPM spindle, 256 MB cache and 261 MB/s sustained transfer for enterprise storage

  • Total capacity16 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • Recording methodCMR
  • 16 TB capacity for massive storage needs
  • 7200 RPM spindle speed delivers up to 261 MB/s sustained transfer
  • Helium-sealed design enables high areal density and power efficiency
  • 256 MB cache buffers heavy multi-stream workloads
  • CMR recording technology ensures consistent performance and broad compatibility

Enterprise 16TB CMR drive

This Seagate Exos X18 16TB 3.5-inch hard drive uses a SATA 6.0Gb/s interface and spins at 7200 RPM with a 256MB cache. The helium-sealed design supports sustained transfer rates up to 261 MB/s. It is built for enterprise NAS, DAS, workstation and data centre server deployments.

Suited for high-capacity bulk storage

It fits builders who need 16TB of CMR capacity on a standard SATA connection for backup, archiving or big-data workloads. It is not for systems that require a smaller form factor, a different interface or lower power draw than a 3.5-inch 7200 RPM drive provides.

SATA 6.0Gb/s interface decides fit

The drive connects through a SATA 6.0Gb/s port and uses 512e sector formatting with CMR recording technology. Verify that the host system has a free SATA data and power connector and supports 3.5-inch drives before purchase.

How it compares

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

Price $371.99
Pricier than about 88% 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 $23.25 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 X18
Model nameST16000NM000J
Part number2TW103-881
Total capacity16 TB
Performance
Rotational speed7,200 RPM
Storage
Cache memory256 MB
Recording methodCMR
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

Does this 3.5in 16TB drive need a SATA power cable and a SATA data cable from my existing power supply and motherboard?

Yes, it connects through a standard SATA 6.0Gb/s interface and requires both a SATA data cable from the motherboard and a SATA power connector from the power supply.

Will the 261 MB/s sustained transfer rate be limited when paired with an older SATA 3.0Gb/s controller?

The drive negotiates down to SATA 3.0Gb/s automatically, so it will function correctly but sustained throughput will be capped at the controller's lower bandwidth.

How can I confirm the helium-sealed CMR drive is healthy after installation?

Check that the BIOS or operating system detects the full 16TB capacity and run a SMART self-test to verify zero reallocated sectors and normal temperature readings.

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