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Seagate ST14000NM0138 14 TB failure rate and reliability
F Grade F: Poor
Backblaze logged 5,003 drive-years on the Seagate ST14000NM0138 from Q1 2023 to Q3 2026, with 1,159 in service at the end of that period. In that time 311 drives failed, an annualised failure rate of 6.22%.
That is 309% higher than the 1.52% average across every drive in the same data, which earns it grade F (poor).
Among the 6 graded 14 TB hard drives it ranks 6 of 6 for reliability.
The rate has been steady: 5.62% over the latest 8 quarters against 6.82% before.
- Failure rate / year
- 6.22%
- Average, all drives
- 1.52%
- Drives in use
- 1,159
- Drive-years
- 5,003
- Failures
- 311
- Capacity
- 14 TB
- Type
- HDD
- Model number
- ST14000NM0138
Failure rate by quarter
| Quarter | Drive-days | Failures | Failure rate / year |
|---|---|---|---|
| Q1 2023 | 134,818 | 23 | 6.23% |
| Q2 2023 | 131,819 | 37 | 10.25% |
| Q3 2023 | 131,842 | 28 | 7.75% |
| Q4 2023 | 129,911 | 28 | 7.87% |
| Q1 2024 | 126,485 | 19 | 5.48% |
| Q2 2024 | 124,708 | 16 | 4.68% |
| Q3 2024 | 124,374 | 18 | 5.28% |
| Q4 2024 | 122,724 | 20 | 5.95% |
| Q1 2025 | 117,692 | 22 | 6.82% |
| Q2 2025 | 116,900 | 14 | 4.37% |
| Q3 2025 | 117,131 | 22 | 6.86% |
| Q4 2025 | 115,388 | 10 | 3.16% |
| Q1 2026 | 111,709 | 15 | 4.90% |
| Q2 2026 | 110,410 | 25 | 8.26% |
| Q3 2026 | 110,263 | 14 | 4.63% |
Single quarters with few drive-days swing widely; the overall figure above is the dependable one.
All 14 TB hard drives compared
| Grade | Model | Type | Size | Failure rate / year | Drives in use | Drive-years | Failures |
|---|---|---|---|---|---|---|---|
| B | Western Digital WUH721414ALE6L4 | HDD | 14 TB | 0.71% | 8,522 | 31,964 | 226 |
| B | Toshiba MG07ACA14TA | HDD | 14 TB | 1.15% | 36,697 | 140,978 | 1,620 |
| C | Seagate ST14000NM001G | HDD | 14 TB | 1.51% | 10,413 | 39,759 | 600 |
| C | Seagate ST14000NM000J | HDD | 14 TB | 1.56% | 497 | 835 | 13 |
| C | Toshiba MG07ACA14TEY | HDD | 14 TB | 1.70% | 965 | 2,944 | 50 |
| F | Seagate ST14000NM0138 | HDD | 14 TB | 6.22% | 1,159 | 5,003 | 311 |
| – | Seagate ST14000NM0018 | HDD | 14 TB | 6.92% | 59 | 231 | 16 |
| – | Seagate ST14000NM002J | HDD | 14 TB | 3.37% | 24 | 30 | 1 |