Seagate · Enterprise
ST12000NM004J
Exos X18 12TB
SAS 12 Gb/s · 3.5-inch
Exact Amazon US product
$405.00
View on Amazon US ↗Used / renewed listing · ASIN B09YRZ1JPC
Price as of Sep 12, 2026 04:48 UTC
The Seagate ST12000NM004J is a 12TB Exos X18 hard drive for server and enterprise storage, using SAS 12 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | ST12000NM004J |
|---|---|
| Nominal capacity | 12 TB · 12000 GB |
| RPM | 7200 |
| Interface | SAS 12 Gb/s |
| Cache (MB) | 256 |
| Form factor | 3.5-inch |
| Average idle power (W) | 5 |
| 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 ST12000NM004J, 12TB and SAS 12 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 B09YRZ1JPC
$405.00 · as of Sep 12, 2026 04:48 UTC
Amazon US · ASIN B0G1V2F9X1
$661.00 · as of Sep 12, 2026 04:48 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.
Toshiba · MG09
MG09SCA12TE
12TB · SAS 12 Gb/s
Compare with ST12000NM004J →View on Amazon US ↗ASIN B0DF5Q81MD · Check price and conditionSeagate · Exos X16
ST12000NM002G
12TB · SAS 12 Gb/s
Compare with ST12000NM004J →View on Amazon US ↗ASIN B086WVVXCS · Check price and conditionSeagate · Exos X16
ST12000NM004G
12TB · SAS 12 Gb/s
Compare with ST12000NM004J →View on Amazon US ↗ASIN B09XDSH9M6 · Check price and conditionST12000NM004J questions answered
What connection does ST12000NM004J need?
ST12000NM004J uses SAS 12 Gb/s. It needs a compatible SAS controller or backplane; a standard motherboard SATA port cannot run it.
How much usable space does ST12000NM004J 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 ST12000NM004J?
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.