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 TC = 0.8 PB
1 PB = 1.25 TC
例子:
将15 涡轮代码冗余转换为奇偶校验的冗余：
15 TC = 12 PB
| 涡轮代码冗余 | 奇偶校验的冗余 |
|---|---|
| 0.01 TC | 0.008 PB |
| 0.1 TC | 0.08 PB |
| 1 TC | 0.8 PB |
| 2 TC | 1.6 PB |
| 3 TC | 2.4 PB |
| 5 TC | 4 PB |
| 10 TC | 8 PB |
| 20 TC | 16 PB |
| 30 TC | 24 PB |
| 40 TC | 32 PB |
| 50 TC | 40 PB |
| 60 TC | 48 PB |
| 70 TC | 56 PB |
| 80 TC | 64 PB |
| 90 TC | 72 PB |
| 100 TC | 80 PB |
| 250 TC | 200 PB |
| 500 TC | 400 PB |
| 750 TC | 600 PB |
| 1000 TC | 800 PB |
| 10000 TC | 8,000 PB |
| 100000 TC | 80,000 PB |
规则