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 FDR = 1.053 RC
1 RC = 0.95 FDR
例子:
将15 频级冗余转换为重复代码：
15 FDR = 15.789 RC
| 频级冗余 | 重复代码 |
|---|---|
| 0.01 FDR | 0.011 RC |
| 0.1 FDR | 0.105 RC |
| 1 FDR | 1.053 RC |
| 2 FDR | 2.105 RC |
| 3 FDR | 3.158 RC |
| 5 FDR | 5.263 RC |
| 10 FDR | 10.526 RC |
| 20 FDR | 21.053 RC |
| 30 FDR | 31.579 RC |
| 40 FDR | 42.105 RC |
| 50 FDR | 52.632 RC |
| 60 FDR | 63.158 RC |
| 70 FDR | 73.684 RC |
| 80 FDR | 84.211 RC |
| 90 FDR | 94.737 RC |
| 100 FDR | 105.263 RC |
| 250 FDR | 263.158 RC |
| 500 FDR | 526.316 RC |
| 750 FDR | 789.474 RC |
| 1000 FDR | 1,052.632 RC |
| 10000 FDR | 10,526.316 RC |
| 100000 FDR | 105,263.158 RC |
规则