The Seagate Exos X20 18TB Enterprise HDD (ST18000NM003D)
is a high-capacity enterprise hard drive designed for data centers,
servers, and large-scale storage systems. It provides 18TB of storage
capacity, a 7,200 RPM spindle speed, and a SATA 6Gb/s interface.
Featuring conventional magnetic recording (CMR), a 256MB cache, and
a helium-sealed drive design, it is built for high-capacity storage
environments and continuous enterprise operation. The drive supports
512e and 4Kn sector formats through Seagate FastFormat technology,
depending on configuration. It is intended for systems with compatible
SATA drive bays and storage controllers.
Key Specifications
Manufacturer
Seagate
Product Line
Exos X20
Part Number / MPN
ST18000NM003D
Product Type
Enterprise Internal Hard Disk Drive
Storage Capacity
18TB
Interface
SATA 6Gb/s
Form Factor
3.5-inch
Spindle Speed
7,200 RPM
Recording Technology
CMR (Conventional Magnetic Recording)
Sector Format
512e / 4Kn (FastFormat)
Cache Buffer
256MB
Maximum Sustained Transfer Rate
Up to 285 MB/s
Average Latency
4.16 ms
Drive Design
Helium-Sealed
MTBF
2.5 Million Hours
Operating Temperature
5°C to 60°C
Additional Features
S.M.A.R.T., Native Command Queuing, PowerChoice
Condition
Used
Compatible With
✓Servers with Compatible SATA Drive Bays
✓Enterprise Storage Systems Supporting SATA HDDs
✓NAS Systems Supporting 18TB SATA Drives
✓Storage Platforms Supporting 512e / 4Kn Drives
Warranty & Returns
Covered by our standard hardware warranty. Tested before dispatch. Extended warranty available. Returns accepted within 30 days — see our Return Policy.
Shipping
Worldwide shipping available; tracking provided. In-stock items usually dispatch within 1 business day.
