Seagate · Enterprise
ST20000NM005D
Exos X20 20TB
12 Gb/s SAS · 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 ST20000NM005D is a 20TB Exos X20 hard drive for server and enterprise storage, using 12 Gb/s SAS in a 3.5-inch form factor.
Manufacturer specifications
| Model number | ST20000NM005D |
|---|---|
| Nominal capacity | 20 TB · 20000 GB |
| FIPS | Yes |
| Interface | 12 Gb/s SAS |
| Form factor | 3.5-inch |
| 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
Before ordering
Match ST20000NM005D, 20TB and 12 Gb/s SAS 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.
Seagate · Exos X20
ST20000NM002D
20TB · 12 Gb/s SAS
Compare with ST20000NM005D →View on Amazon US ↗ASIN B09MWKN3RN · Check price and conditionSeagate · Exos X20
ST20000NM003D
20TB · 12 Gb/s SAS
Compare with ST20000NM005D →View on Amazon US ↗ASIN B0B1S1GZPF · Check price and conditionST20000NM005D questions answered
What connection does ST20000NM005D need?
ST20000NM005D uses 12 Gb/s SAS. It needs a compatible SAS controller or backplane; a standard motherboard SATA port cannot run it.
How much usable space does ST20000NM005D 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 ST20000NM005D?
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.