Seagate IronWolf Pro 20TB
20TB
Model ST20000NT001
- rpm
- 7,200
- MB cache
- 256
- TB/yr
- 550
- yr warranty
- 5
IronWolf Pro range, also in 12 TB, 16 TB, 24 TB
Who the IronWolf Pro 20 TB is for
This is the one to look at once you're past eight bays or the array's busy all day, because Seagate rates it for 550 TB a year and doesn't care how big the box is. You also get five years' warranty, two more than the cheapest NAS lines. Recording is CMR, the right kind for RAID and ZFS.
Watch out for
Being 7,200 rpm, it's in the noisier, warmer class of drive, and you'll want it somewhere you don't sit.
There's no Backblaze data worth quoting here. Four of them in SHR or RAID 5 give 60 TB usable, or 54.6 TB once Windows has done its binary maths on it.
Specifications
Each value links to the Seagate page or datasheet it came from, and "Not published" means the maker doesn't list it there.
| Capacity | 20 TB | source for Capacity (seagate.com, opens in new tab) |
|---|---|---|
| Spindle speed | 7,200 rpm | source for Spindle speed (seagate.com, opens in new tab) |
| Recording technology | CMR | source for Recording technology (seagate.com, opens in new tab) |
| Cache | 256 MB | source for Cache (seagate.com, opens in new tab) |
| Interface | SATA 6Gb/s | source for Interface (seagate.com, opens in new tab) |
| Form factor | 3.5in | source for Form factor (seagate.com, opens in new tab) |
| Workload rating | 550 TB/yr | source for Workload rating (seagate.com, opens in new tab) |
| MTBF / MTTF | 2,500,000 hours | source for MTBF / MTTF (seagate.com, opens in new tab) |
| Rated for any number of NAS bays | Yes | source for Rated for any number of NAS bays (seagate.com, opens in new tab) |
| Warranty | 5 years | source for Warranty (seagate.com, opens in new tab) |
Sources: seagate.com
Failure rate
There's no Backblaze figure for this one. We only publish a rate with at least 60 drives and 50 drive-years behind it, because below that the error bars are too wide to tell you anything. The reliability page has every model that clears the bar.
Seagate IronWolf Pro 20TBST20000NT001