DiskGradeWestern Digital WUH722626ALE6L4 26 TB failure rate and reliability
B Grade B: Good
Backblaze logged 3,793 drive-years on the Western Digital WUH722626ALE6L4 from Q1 2023 to Q3 2026, with 7,021 in service at the end of that period. In that time 35 drives failed, an annualised failure rate of 0.92%.
That is 39% lower than the 1.52% average across every drive in the same data, which earns it grade B (good).
The rate has been steady: 0.99% over the latest 2 quarters against 0.67% before.
- Failure rate / year
- 0.92%
- Average, all drives
- 1.52%
- Drives in use
- 7,021
- Drive-years
- 3,793
- Failures
- 35
- Capacity
- 26 TB
- Type
- HDD
- Model number
- WUH722626ALE6L4
Failure rate by quarter
| Quarter | Drive-days | Failures | Failure rate / year |
|---|---|---|---|
| Q4 2025 | 91,690 | 1 | 0.40% |
| Q1 2026 | 182,471 | 4 | 0.80% |
| Q2 2026 | 462,366 | 12 | 0.95% |
| Q3 2026 | 648,002 | 18 | 1.01% |
Single quarters with few drive-days swing widely; the overall figure above is the dependable one.