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Toshiba MG11ACA24TE 24 TB failure rate and reliability
A Grade A: Excellent
Backblaze logged 7,816 drive-years on the Toshiba MG11ACA24TE from Q1 2023 to Q3 2026, with 16,556 in service at the end of that period. In that time 41 drives failed, an annualised failure rate of 0.52%.
That is 65% lower than the 1.52% average across every drive in the same data, which earns it grade A (excellent).
Among the 2 graded 24 TB hard drives it ranks 1 of 2 for reliability.
The rate has been steady: 0.50% over the latest 3 quarters against 0.68% before.
- Failure rate / year
- 0.52%
- Average, all drives
- 1.52%
- Drives in use
- 16,556
- Drive-years
- 7,816
- Failures
- 41
- Capacity
- 24 TB
- Type
- HDD
- Model number
- MG11ACA24TE
Failure rate by quarter
| Quarter | Drive-days | Failures | Failure rate / year |
|---|---|---|---|
| Q3 2025 | 24,148 | 0 | 0.00% |
| Q4 2025 | 349,939 | 7 | 0.73% |
| Q1 2026 | 495,387 | 3 | 0.22% |
| Q2 2026 | 824,903 | 13 | 0.58% |
| Q3 2026 | 1,158,365 | 18 | 0.57% |
Single quarters with few drive-days swing widely; the overall figure above is the dependable one.
All 24 TB hard drives compared
| Grade | Model | Type | Size | Failure rate / year | Drives in use | Drive-years | Failures |
|---|---|---|---|---|---|---|---|
| A | Toshiba MG11ACA24TE | HDD | 24 TB | 0.52% | 16,556 | 7,816 | 41 |
| D | Seagate ST24000NM002H | HDD | 24 TB | 3.36% | 9,433 | 12,353 | 415 |