Seagate · Enterprise
ST18000NM000J
Exos X18 18TB
SATA 6 Gb/s · 3.5-inch
Exact Amazon US product
$725.91
View on Amazon US ↗New listing · ASIN B08JV6PP9B
Price as of Sep 12, 2026 11:43 UTC
The Seagate ST18000NM000J is a 18TB Exos X18 hard drive for server and enterprise storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | ST18000NM000J |
|---|---|
| Nominal capacity | 18 TB · 18000 GB |
| RPM | 7200 |
| Interface | SATA 6 Gb/s |
| Cache (MB) | 256 |
| Form factor | 3.5-inch |
| Average idle power (W) | 5.3 |
| Power-on hours per year | 8760 |
| Manufacturer limited warranty | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 270 |
Source: Seagate Exos X18 manufacturer specifications, pages 2. Reviewed 2026-09-07. Published specifications, not our benchmark results.
What the specifications mean
- Up to 270 MB/s sustained transfer, as specified by the manufacturer. This is not a measured game-loading or random-I/O result.
Before ordering
Match ST18000NM000J, 18TB and SATA 6 Gb/s against the selected offer. Check your system’s exact-model compatibility list and the seller’s warranty and return terms.
Amazon US listings
Exact model matches on Amazon.com. A verified ASIN identifies the product; it does not guarantee current stock. Check the selected variant, condition and seller.
Amazon US · ASIN B08JV6PP9B
$725.91 · as of Sep 12, 2026 11:43 UTC
Amazon US · ASIN B08JV6PP9B
$479.99 · as of Sep 12, 2026 11:43 UTC
Amazon US · ASIN B0D5KR38K1
$539.99 · as of Sep 12, 2026 10:58 UTC
Same-capacity alternatives with Amazon US links
These models share the drive type, interface class and capacity. Compare their specifications and your system requirements before choosing a replacement.
Western Digital · WD Gold
WD181KRYZ
18TB · SATA 6Gb/s · CMR
Compare with ST18000NM000J →View on Amazon US ↗ASIN B09BHTP2HC · Check price and conditionWestern Digital · WD Red Pro
WD181KFGX
18TB · SATA 6Gb/s · CMR
Compare with ST18000NM000J →View on Amazon US ↗ASIN B08QVFKGQR · Check price and conditionToshiba · MG09
MG09ACA18TE
18TB · SATA 6 Gb/s
Compare with ST18000NM000J →View on Amazon US ↗ASIN B093Z5LFWD · Check price and conditionST18000NM000J questions answered
What connection does ST18000NM000J need?
ST18000NM000J uses SATA 6 Gb/s and a 3.5-inch form factor. Match both with the computer, controller or enclosure. An M.2 slot, 2.5-inch bay and 3.5-inch bay are not interchangeable.
How much usable space does ST18000NM000J provide?
Its nominal capacity is 18000 GB, approximately 16763.8 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for ST18000NM000J?
Manufacturer specification: 5 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.