Chapter 2 - 20. Understanding Congestion in Fibre Channel Fabrics
FEC — What Matters in a Production Network生产网络的重要性
While operating production storage networks, knowing the internal details of FEC isn’t needed when trying to troubleshoot a congestion issue or application slowdown. What’s important to remember is the following: 在操作生产存储网络时，当尝试排除拥塞问题或应用程序速度减慢时，并不需要了解 FEC 的内部细节。重要的是要记住以下几点：
FEC may be able to correct a limited number of errors. The exact correction rate depends on the FEC code and the extent of corruption. FEC 可纠正的错误数量有限。确切的纠错率取决于 FEC 编码和损坏程度。
FEC is not magic. As mentioned, it can’t recover all the errors. FEC 并不神奇。如前所述，它无法恢复所有错误。
CRC, ITW, and other errors may still be seen with FEC. If FEC can’t correct an error, it simply reports it as an “FEC uncorrected block’ and passes the bit-stream to the higher layers. 使用 FEC 时仍可能出现 CRC、ITW