DiskGradeWestern Digital WDS250G2B0A 250 GB failure rate and reliability
A Grade A: Excellent
Backblaze logged 576 drive-years on the Western Digital WDS250G2B0A from Q1 2023 to Q3 2026, with 170 in service at the end of that period. In that time 2 drives failed, an annualised failure rate of 0.35%.
That is 77% lower than the 1.52% average across every drive in the same data, which earns it grade A (excellent).
Among the 7 graded 250 GB SSDs it ranks 3 of 7 for reliability.
- Failure rate / year
- 0.35%
- Average, all drives
- 1.52%
- Drives in use
- 170
- Drive-years
- 576
- Failures
- 2
- Capacity
- 250 GB
- Type
- SSD
- Model number
- WDS250G2B0A
Failure rate by quarter
| Quarter | Drive-days | Failures | Failure rate / year |
|---|---|---|---|
| Q1 2023 | 8,872 | 1 | 4.11% |
| Q2 2023 | 9,670 | 0 | 0.00% |
| Q3 2023 | 10,723 | 0 | 0.00% |
| Q4 2023 | 12,312 | 1 | 2.96% |
| Q1 2024 | 12,480 | 0 | 0.00% |
| Q2 2024 | 15,711 | 0 | 0.00% |
| Q3 2024 | 16,373 | 0 | 0.00% |
| Q4 2024 | 16,192 | 0 | 0.00% |
| Q1 2025 | 15,597 | 0 | 0.00% |
| Q2 2025 | 15,170 | 0 | 0.00% |
| Q3 2025 | 15,364 | 0 | 0.00% |
| Q4 2025 | 15,307 | 0 | 0.00% |
| Q1 2026 | 15,207 | 0 | 0.00% |
| Q2 2026 | 15,530 | 0 | 0.00% |
| Q3 2026 | 15,632 | 0 | 0.00% |
Single quarters with few drive-days swing widely; the overall figure above is the dependable one.
All 250 GB SSDs compared
| Grade | Model | Type | Size | Failure rate / year | Drives in use | Drive-years | Failures |
|---|---|---|---|---|---|---|---|
| A | Seagate IronWolf ZA250NM10002 | SSD | 250 GB | 0.00% | 201 | 510 | 0 |
| A | Seagate BarraCuda 120 SSD ZA250CM10003 | SSD | 250 GB | 0.20% | 1,072 | 4,095 | 8 |
| A | Western Digital WDS250G2B0A | SSD | 250 GB | 0.35% | 170 | 576 | 2 |
| A | Crucial CT250MX500SSD1 | SSD | 250 GB | 0.36% | 683 | 2,475 | 9 |
| B | Seagate BarraCuda SSD ZA250CM10002 | SSD | 250 GB | 0.74% | 458 | 1,889 | 14 |
| C | Seagate SSD | SSD | 250 GB | 1.33% | 97 | 377 | 5 |
| F | Western Digital Blue SA510 2.5 250GB | SSD | 250 GB | 4.80% | 140 | 417 | 20 |