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WD 18TB Gold 7200 rpm SATA III 3.5" Internal Datacenter HDD

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  • 18TB Storage Capacity
  • 3.5" Form Factor
  • SATA III 6 Gb/s Interface
  • 256MB Cache
  • 7200 rpm
  • Up to 255 MB/s Data Transfer Rate
  • 600,000 Load/Unload Cycles
  • 2.5 Million Hours MTBF
  • Lower Power Consumption
  • HelioSeal Helium Technology

The WD 18TB Gold 7200 rpm SATA III 3.5" Internal Datacenter HDD is a high-capacity storage drive designed for use in servers and storage arrays. It has a SATA III 6 Gb/s interface, 256MB cache, and a 7200 rpm rotational speed that allows for a sustained rate of up to 255 MB/s. The WD 18TB Gold 7200 rpm SATA III 3.5" Internal Datacenter HDD uses HelioSeal Helium technology, which reduces power consumption by up to 26% compared to standard drives. It has an error tolerance of <1 in 1015, MTBF of 2.5 million hours, and an AFR of 0.35%, making it a reliable option for small- to medium-scale enterprise environments. Additionally, Western Digital offers 24/7 premium support and includes Acronis True Image WD Edition cloning software.

Workload Capability

Delivering both performance and reliability to any datacenter environment, WD Gold hard drives are designed to handle workloads up to 550TB per year.


With a MTBF of up to 2.5 million hours, WD Gold hard drives deliver reliability and durability for yearly operation (24x7x365) within demanding storage environments.

Disk Utilities and Migration Tools

Acronis True Image WD Edition can clone drives as well as backup your operating system, applications, settings, and all of your data, while also having the ability to wipe any data you no longer need securely. You can quickly and easily deploy a new hard drive to your PC or laptop and automatically migrate your operating system, applications, and all of your important data.

RAID-Specific, Time-Limited Error Recovery (TLER)

Reduces the drive's fallout caused by the extended hard drive error-recovery processes common to desktop drives.

Extended Thermal Burn-in Test

Each drive is put through extended burn-in testing with thermal cycling to ensure reliable operation.

Dynamic Fly Height and Dual Actuators

A head positioning system with two actuators that improves positional accuracy over the data track. The primary actuator provides coarse displacement using conventional electromagnetic actuator principles. The secondary actuator uses piezoelectric motion to fine tune the head positioning to a higher degree of accuracy.

In the Box
  • WD 18TB Gold 7200 rpm SATA III 3.5" Internal Datacenter HDD
  • Limited 5-Year Manufacturer Warranty
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More Information


512 Emulation Model Number WD121KRYZ
Formatted Capacity 12 TB
Interface SATA III 6 Gb/s
512n/512e User Sectors per Drive 23,437,770,752
Native Command Queuing Yes
Form Factor 3.5"
Compatibility Windows, Windows Server, Linux, and Mac OS
RoHS Compliant Yes


Data Transfer Rate (max) Buffer to Host: 6 Gb/s Host to/from drive (sustained): 255 MB/s
Cache 256 MB
Rotational Speed 7200 rpm

Reliability/Data Integrity

Load/Unload Cycles 600,000
Non-Recoverable Read Errors per Bits Read <1 in 1015
Mean Time Between Failures (MTBF) 2.5 million hours
Annualized Failure Rate (AFR) 0.35%

Power Management

Average Power Requirements Sequential Read: 7.0 W Sequential Write: 6.8 W Random Read/Write: 6.9 W Idle: 5.0 W

Environmental Specifications

Temperature Operating: 41 to 140°F / 5 to 60°C Non-Operating: -40 to 158°F / -40 to 70°C
Shock Operating (half-sine wave, 2 ms): 70 G Non-operating (half-sine wave): 300 G (1 ms) / 150 G (11 ms)
Acoustics Idle: 20 dBA Seek mode: 36 dBA

Physical Dimensions

Dimensions 1.028 x 5.787 x 4.000" / 26.11 x 146.9 x 101.6 mm
Weight 1.46 lb / 0.66 kg

Packaging Info

Package Weight 1.675 lb
Box Dimensions (LxWxH) 8.5 x 6.4 x 4.85"
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov
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