Seagate · PC / gaming
ST20000DM001
BarraCuda 20TB
SATA 6 Gb/s · 3.5-inch · CMR
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Listing details ↓As an Amazon Associate I earn from qualifying purchases.The Seagate ST20000DM001 is a 20TB BarraCuda hard drive for desktop and gaming storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | ST20000DM001 |
|---|---|
| Nominal capacity | 20 TB · 20000 GB |
| Interface | SATA 6 Gb/s |
| Recording | CMR |
| Cache (MB) | 512 |
| Form factor | 3.5-inch |
| Load/unload cycles | 600000 |
| Power-on hours per year | 2400 |
| Workload rating (TB/year) | 120 |
| Manufacturer limited warranty | 2 years (eligible new drives) |
Source: Seagate BarraCuda 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.
- 120 TB/year workload rating. This is a workload limit, not a promise of drive lifespan or a backup guarantee.
Before ordering
Match ST20000DM001, 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 B0F1NK3437
ST20000DM001 questions answered
Is ST20000DM001 CMR or SMR?
The manufacturer lists CMR recording for ST20000DM001. Other models and capacities in the same family can differ.
What connection does ST20000DM001 need?
ST20000DM001 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 ST20000DM001 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 ST20000DM001?
Manufacturer specification: 2 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.