Seagate · Enterprise
ST20000NM000D
Exos X20 20TB
SATA 6 Gb/s · 3.5-inch · CMR
Exact Amazon US product
$994.43
View on Amazon US ↗New listing · ASIN B0B1S3MKL4
Price as of Oct 12, 2026 17:02 UTC
The Seagate ST20000NM000D is a 20TB Exos X20 hard drive for server and enterprise storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | ST20000NM000D |
|---|---|
| Nominal capacity | 20 TB · 20000 GB |
| FIPS | No |
| Interface | SATA 6 Gb/s |
| Recording | CMR |
| Form factor | 3.5-inch |
| Recording evidence | Manufacturer recording specification ↗ |
| Recording verified | 2026-10-02 |
| Manufacturer limited warranty | 5 years (eligible new drives) |
Source: Seagate Exos X20 manufacturer specifications. 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.
Before ordering
Match ST20000NM000D, 20TB 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 B0B1S3MKL4
$994.43 · as of Oct 12, 2026 17:02 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 · N300 Pro
HDWG82AXZSTB
20TB · SATA 6 Gb/s · CMR
Specifications & offers →View on Amazon US ↗ASIN B0GWF54V5M · Check price and conditionToshiba · MG10
MG10ACA20TE
20TB · SATA 6 Gb/s · CMR
Compare with ST20000NM000D →View on Amazon US ↗ASIN B0BMQWLCCM · Check price and conditionWestern Digital · WD Gold
WD203KRYZ
20TB · SATA 6Gb/s · CMR
Compare with ST20000NM000D →View on Amazon US ↗ASIN B0DF9FK544 · Check price and conditionST20000NM000D questions answered
Is ST20000NM000D CMR or SMR?
The manufacturer lists CMR recording for ST20000NM000D. Other models and capacities in the same family can differ.
What connection does ST20000NM000D need?
ST20000NM000D 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 ST20000NM000D provide?
Its nominal capacity is 20000 GB, approximately 18626.5 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for ST20000NM000D?
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.