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 SC = 0.45 PB
1 PB = 2.222 SC
例子:
将15 源编码冗余转换为奇偶校验的冗余：
15 SC = 6.75 PB
| 源编码冗余 | 奇偶校验的冗余 |
|---|---|
| 0.01 SC | 0.005 PB |
| 0.1 SC | 0.045 PB |
| 1 SC | 0.45 PB |
| 2 SC | 0.9 PB |
| 3 SC | 1.35 PB |
| 5 SC | 2.25 PB |
| 10 SC | 4.5 PB |
| 20 SC | 9 PB |
| 30 SC | 13.5 PB |
| 40 SC | 18 PB |
| 50 SC | 22.5 PB |
| 60 SC | 27 PB |
| 70 SC | 31.5 PB |
| 80 SC | 36 PB |
| 90 SC | 40.5 PB |
| 100 SC | 45 PB |
| 250 SC | 112.5 PB |
| 500 SC | 225 PB |
| 750 SC | 337.5 PB |
| 1000 SC | 450 PB |
| 10000 SC | 4,500 PB |
| 100000 SC | 45,000 PB |
规则