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 CR = 0.7 PB
1 PB = 1.429 CR
例子:
将15 频道冗余转换为奇偶校验的冗余：
15 CR = 10.5 PB
| 频道冗余 | 奇偶校验的冗余 |
|---|---|
| 0.01 CR | 0.007 PB |
| 0.1 CR | 0.07 PB |
| 1 CR | 0.7 PB |
| 2 CR | 1.4 PB |
| 3 CR | 2.1 PB |
| 5 CR | 3.5 PB |
| 10 CR | 7 PB |
| 20 CR | 14 PB |
| 30 CR | 21 PB |
| 40 CR | 28 PB |
| 50 CR | 35 PB |
| 60 CR | 42 PB |
| 70 CR | 49 PB |
| 80 CR | 56 PB |
| 90 CR | 63 PB |
| 100 CR | 70 PB |
| 250 CR | 175 PB |
| 500 CR | 350 PB |
| 750 CR | 525 PB |
| 1000 CR | 700 PB |
| 10000 CR | 7,000 PB |
| 100000 CR | 70,000 PB |
规则