DiskGradeSeagate ST6000DX000 6 TB failure rate and reliability
A Grade A: Excellent
Backblaze logged 1,147 drive-years on the Seagate ST6000DX000 from Q1 2023 to Q3 2026. In that time 6 drives failed, an annualised failure rate of 0.52%.
That is 66% lower than the 1.52% average across every drive in the same data, which earns it grade A (excellent).
Failures have fallen: 0.21% over the latest 3 quarters against 0.76% before.
Backblaze no longer runs this model, so these figures are historical.
- Failure rate / year
- 0.52%
- Average, all drives
- 1.52%
- Drives in use
- 0
- Drive-years
- 1,147
- Failures
- 6
- Capacity
- 6 TB
- Type
- HDD
- Model number
- ST6000DX000
Failure rate by quarter
| Quarter | Drive-days | Failures | Failure rate / year |
|---|---|---|---|
| Q1 2023 | 79,651 | 2 | 0.92% |
| Q2 2023 | 80,411 | 3 | 1.36% |
| Q3 2023 | 81,236 | 0 | 0.00% |
| Q4 2023 | 81,163 | 1 | 0.45% |
| Q1 2024 | 80,262 | 0 | 0.00% |
| Q2 2024 | 15,875 | 0 | 0.00% |
Single quarters with few drive-days swing widely; the overall figure above is the dependable one.