系统内冗余或重复数据的度量，表明存储和潜在性能问题效率低下。
1 PB = 1.25 RF
1 RF = 0.8 PB
例子:
将15 奇偶校验的冗余转换为可靠性因素：
15 PB = 18.75 RF
| 奇偶校验的冗余 | 可靠性因素 |
|---|---|
| 0.01 PB | 0.013 RF |
| 0.1 PB | 0.125 RF |
| 1 PB | 1.25 RF |
| 2 PB | 2.5 RF |
| 3 PB | 3.75 RF |
| 5 PB | 6.25 RF |
| 10 PB | 12.5 RF |
| 20 PB | 25 RF |
| 30 PB | 37.5 RF |
| 40 PB | 50 RF |
| 50 PB | 62.5 RF |
| 60 PB | 75 RF |
| 70 PB | 87.5 RF |
| 80 PB | 100 RF |
| 90 PB | 112.5 RF |
| 100 PB | 125 RF |
| 250 PB | 312.5 RF |
| 500 PB | 625 RF |
| 750 PB | 937.5 RF |
| 1000 PB | 1,250 RF |
| 10000 PB | 12,500 RF |
| 100000 PB | 125,000 RF |
规则