Toshiba MG10 20TB
20TB
Model MG10ACA20TE
- rpm
- 7,200
- MB cache
- 512
- TB/yr
- 550
- yr warranty
- 5
MG10 range
Should you buy the MG10 20 TB?
It makes most sense when you're chasing terabytes per pound and the NAS sits somewhere noise doesn't matter. Think garage, or a rack in the cupboard under the stairs. Toshiba backs it for five years, which is a long time in drive terms. Its Backblaze record's good too, with 0.79% AFR across 25,546 drive-years and the whole interval below the 1.40% median for the drives they report. CMR, thankfully. SMR and parity rebuilds don't get on.
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.
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 Toshiba page or datasheet it came from, and "Not published" means the maker doesn't list it there.
| Capacity | 20 TB | source for Capacity (storage.toshiba.com, opens in new tab) |
|---|---|---|
| Spindle speed | 7,200 rpm | source for Spindle speed (storage.toshiba.com, opens in new tab) |
| Recording technology | CMR | source for Recording technology (storage.toshiba.com, opens in new tab) |
| Cache | 512 MB | source for Cache (storage.toshiba.com, opens in new tab) |
| Interface | SATA 6Gb/s | source for Interface (storage.toshiba.com, opens in new tab) |
| Form factor | 3.5in | source for Form factor (storage.toshiba.com, opens in new tab) |
| Workload rating | 550 TB/yr | source for Workload rating (storage.toshiba.com, opens in new tab) |
| MTBF / MTTF | 2,500,000 hours | source for MTBF / MTTF (storage.toshiba.com, opens in new tab) |
| Warranty | 5 years | source for Warranty (toshiba-storage.com, opens in new tab) |
Sources: storage.toshiba.com, toshiba-storage.com
Failure rate
Backblaze has 25,171 of them in service as TOSHIBA MG10ACA20TE. They've clocked up 25,546 drive-years between them and 201 have died, which puts the lifetime AFR at 0.79% (95% interval 0.68% to 0.90%, comfortably under the 1.40% median for the drive models they report).
Lifetime25,546 drive-yrs 0.79%0.68–0.90
2025 Q318,001 drives 0.54%0.34–0.83
2025 Q417,999 drives 0.62%0.41–0.89
2026 Q120,407 drives 0.92%0.66–1.24
2026 Q225,171 drives 1.10%0.85–1.41
Median lifetime AFR across Backblaze drive models: 1.40%
Source: Backblaze Drive Stats, lifetime to 2026 Q2. Bear in mind that's data-centre use, which is a lot harder on a drive than a home NAS will ever be.
Toshiba MG10 20TBMG10ACA20TE