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Toshiba MG08ACA16TA 16 TB failure rate and reliability
B Grade B: Good
Backblaze logged 121,800 drive-years on the Toshiba MG08ACA16TA from Q1 2023 to Q3 2026, with 38,772 in service at the end of that period. In that time 1,260 drives failed, an annualised failure rate of 1.03%.
That is 32% lower than the 1.52% average across every drive in the same data, which earns it grade B (good).
Among the 8 graded 16 TB hard drives it ranks 4 of 8 for reliability.
The rate has been steady: 0.92% over the latest 8 quarters against 1.25% before.
- Failure rate / year
- 1.03%
- Average, all drives
- 1.52%
- Drives in use
- 38,772
- Drive-years
- 121,800
- Failures
- 1,260
- Capacity
- 16 TB
- Type
- HDD
- Model number
- MG08ACA16TA
Failure rate by quarter
| Quarter | Drive-days | Failures | Failure rate / year |
|---|---|---|---|
| Q1 2023 | 440,772 | 4 | 0.33% |
| Q2 2023 | 467,288 | 4 | 0.31% |
| Q3 2023 | 1,513,960 | 42 | 1.01% |
| Q4 2023 | 2,572,990 | 99 | 1.40% |
| Q1 2024 | 3,285,527 | 82 | 0.91% |
| Q2 2024 | 3,517,575 | 114 | 1.18% |
| Q3 2024 | 3,594,742 | 181 | 1.84% |
| Q4 2024 | 3,692,064 | 107 | 1.06% |
| Q1 2025 | 3,616,128 | 94 | 0.95% |
| Q2 2025 | 3,650,278 | 115 | 1.15% |
| Q3 2025 | 3,686,376 | 85 | 0.84% |
| Q4 2025 | 3,670,933 | 68 | 0.68% |
| Q1 2026 | 3,548,250 | 102 | 1.05% |
| Q2 2026 | 3,614,263 | 102 | 1.03% |
| Q3 2026 | 3,585,794 | 61 | 0.62% |
Single quarters with few drive-days swing widely; the overall figure above is the dependable one.
All 16 TB hard drives compared
| Grade | Model | Type | Size | Failure rate / year | Drives in use | Drive-years | Failures |
|---|---|---|---|---|---|---|---|
| A | Seagate ST16000NM002J | HDD | 16 TB | 0.56% | 463 | 1,607 | 9 |
| B | Western Digital WUH721816ALE6L4 | HDD | 16 TB | 0.60% | 26,751 | 87,781 | 529 |
| B | Seagate ST16000NM001G | HDD | 16 TB | 0.62% | 35,594 | 117,216 | 725 |
| B | Toshiba MG08ACA16TA | HDD | 16 TB | 1.03% | 38,772 | 121,800 | 1,260 |
| B | Toshiba MG08ACA16TE | HDD | 16 TB | 1.14% | 6,170 | 22,458 | 257 |
| C | Toshiba MG09ACA16TE | HDD | 16 TB | 1.71% | 1,009 | 703 | 12 |
| C | Western Digital WUH721816ALE6L0 | HDD | 16 TB | 1.81% | 2,896 | 10,953 | 198 |
| D | Toshiba MG08ACA16TEY | HDD | 16 TB | 2.91% | 4,767 | 19,015 | 554 |
| – | Seagate ST16000NM000J | HDD | 16 TB | 2.23% | 171 | 269 | 6 |
| – | Seagate ST16000NM005G | HDD | 16 TB | 0.00% | 25 | 94 | 0 |
| – | Toshiba MG11ACA16TE | HDD | 16 TB | 0.00% | 76 | 34 | 0 |