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 HC = 0.75 PB
1 PB = 1.333 HC
例子:
将15 锤子代码冗余转换为奇偶校验的冗余：
15 HC = 11.25 PB
| 锤子代码冗余 | 奇偶校验的冗余 |
|---|---|
| 0.01 HC | 0.008 PB |
| 0.1 HC | 0.075 PB |
| 1 HC | 0.75 PB |
| 2 HC | 1.5 PB |
| 3 HC | 2.25 PB |
| 5 HC | 3.75 PB |
| 10 HC | 7.5 PB |
| 20 HC | 15 PB |
| 30 HC | 22.5 PB |
| 40 HC | 30 PB |
| 50 HC | 37.5 PB |
| 60 HC | 45 PB |
| 70 HC | 52.5 PB |
| 80 HC | 60 PB |
| 90 HC | 67.5 PB |
| 100 HC | 75 PB |
| 250 HC | 187.5 PB |
| 500 HC | 375 PB |
| 750 HC | 562.5 PB |
| 1000 HC | 750 PB |
| 10000 HC | 7,500 PB |
| 100000 HC | 75,000 PB |
规则