We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Silver 3.5 inch enterprise hard drive with SAS connector and helium-sealed label

Seagate

Seagate Exos X18 ST16000NM004J 16TB SAS 7200 RPM 256MB 3.5" internal hard drive

SKU CH-AGKX-BCED2 MPN ST16000NM004J

Enterprise 16 TB SAS drive with 7200 RPM, 256 MB cache and helium-sealed CMR design for servers and storage arrays

  • Capacity16TB
  • RPM7200 RPM
  • InterfaceSAS 12Gb/s
  • Cache256MB
  • Recording TechnologyCMR
  • Form Factor3.5"

Options 16TB Exos X18

Struck-through versions exist but are not stocked here.

  • 16 TB capacity stores massive datasets
  • SAS 12 Gb/s interface delivers 261 MB/s sustained throughput
  • Helium-sealed design reduces drag for efficient 7200 RPM operation
  • CMR recording technology ensures consistent write performance
  • 256 MB cache accelerates burst workloads in enterprise arrays

Capacity and interface

The Seagate Exos X18 ST16000NM004J is a 16TB enterprise hard drive with a SAS 12Gb/s interface and 7200 RPM spindle speed. It uses CMR recording technology and a helium-sealed design for high-capacity storage in servers, storage arrays and workstation computers. The 256MB cache supports sustained throughput for demanding workloads.

Sustained workload behaviour

Sustained data transfer rate reaches up to 261 MB/s during continuous operation. The helium-sealed design reduces internal turbulence and helps maintain consistent performance under heavy load. Idle Power Management and Power Efficiency Optimization lower power draw during quieter periods. Digital environmental sensors monitor operating conditions in real time.

Installation and common issues

The 3.5-inch form factor fits standard enterprise drive bays and backplanes using the SAS connector. Installers must verify that the host controller supports SAS 12Gb/s and the required sector format, either 512e or 4Kn. A missing or mismatched controller is the most common reason the drive is not recognised. Adequate airflow in the chassis is needed to keep the helium-sealed unit within thermal limits.

Highlights

  • 16 TB capacity stores massive datasets
  • SAS 12 Gb/s interface delivers 261 MB/s sustained throughput
  • Helium-sealed design reduces drag for efficient 7200 RPM operation
  • CMR recording technology ensures consistent write performance
  • 256 MB cache accelerates burst workloads in enterprise arrays

Specifications

BrandSeagate
SeriesExos X18
ModelST16000NM004J
Part Number2TW203-004
Capacity16TB
RPM7200 RPM
InterfaceSAS 12Gb/s
Cache256MB
Recording TechnologyCMR
Form Factor3.5"
FeaturesHelium-sealed design, Idle Power Management, Power Efficiency Optimization, Digital environmental sensors
Shipping weight0.64 kg
Package size206 × 152 × 25 mm

Other versions of this model

3 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.