Seagate · Enterprise
ST12000NM000J
Exos X18 12TB
SATA 6 Gb/s · 3.5-inch
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An exact Amazon listing has not been verified for this model yet.
Compare alternatives ↓As an Amazon Associate I earn from qualifying purchases.The Seagate ST12000NM000J is a 12TB 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 | ST12000NM000J |
|---|---|
| Nominal capacity | 12 TB · 12000 GB |
| RPM | 7200 |
| Interface | SATA 6 Gb/s |
| Cache (MB) | 256 |
| Form factor | 3.5-inch |
| Average idle power (W) | 4.4 |
| 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 3. 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 ST12000NM000J, 12TB 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.
No verified exact-model ASIN is linked yet. This does not establish whether the model is currently available. Compare the alternatives below and check their listings.
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
WD122KRYZ
12TB · SATA 6Gb/s · CMR
Compare with ST12000NM000J →View on Amazon US ↗ASIN B0DF93LR3N · Check price and conditionWestern Digital · WD Red Pro
WD121KFBX
12TB · SATA 6Gb/s · CMR
Compare with ST12000NM000J →View on Amazon US ↗ASIN B07RTMPWD8 · Check price and conditionWestern Digital · WD Red Pro
WD122KFBX
12TB · SATA 6Gb/s · CMR
Compare with ST12000NM000J →View on Amazon US ↗ASIN B0FGY75FTX · Check price and conditionST12000NM000J questions answered
What connection does ST12000NM000J need?
ST12000NM000J 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 ST12000NM000J provide?
Its nominal capacity is 12000 GB, approximately 11175.9 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for ST12000NM000J?
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.