Seagate · Enterprise
ST18000NM001J
Exos X18 18TB
SATA 6 Gb/s · 3.5-inch · CMR
Exact Amazon US product
$884.45
View on Amazon US ↗New listing · ASIN B09FZNXQXR
Price as of Oct 12, 2026 17:01 UTC
The Seagate ST18000NM001J 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 | ST18000NM001J |
|---|---|
| Nominal capacity | 18 TB · 18000 GB |
| RPM | 7200 |
| Interface | SATA 6 Gb/s |
| Recording | CMR |
| Cache (MB) | 256 |
| Form factor | 3.5-inch |
| Recording evidence | Manufacturer recording specification ↗ |
| Recording verified | 2026-10-02 |
| 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
- CMR recording is specified for this exact model. Check enclosure support and workload limits before installing it in an array.
- 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 ST18000NM001J, 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 B09FZNXQXR
$884.45 · as of Oct 12, 2026 17:01 UTC
Same-capacity alternatives with Amazon US links
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Specifications & offers →View on Amazon US ↗ASIN B09NP4Y2JC · Check price and conditionST18000NM001J questions answered
Is ST18000NM001J CMR or SMR?
The manufacturer lists CMR recording for ST18000NM001J. Other models and capacities in the same family can differ.
What connection does ST18000NM001J need?
ST18000NM001J 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 ST18000NM001J 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 ST18000NM001J?
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.