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什么是CRC错误和运行不足错误?

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适用场景

Data ONTAP 7 及更早版本

问题解答

 

  • 通过光纤通道仲裁环路(FC-AL)循环的帧的数据有效负载存在CRC错误。当Data ONTAP 写入磁盘(例如磁盘或ESH模块)时、环路中的设备会检测到这些错误。错误检测设备通常不会对这些错误负责。 
  • 检测到CRC错误后、Data ONTAP 将重新传输受影响的数据。通常、这些错误是瞬时的、因此重新传输将清除此问题。Data ONTAP 尝试重新路径并重试I/O操作三次。如果三次重新传输失败、Data ONTAP 将使磁盘出现故障。 

注意:在对CRC错误进行故障排除时、请注意、导致CRC错误的设备位于环路中报告此错误的磁盘之前的某个位置。使用"fcadmin link_ststats"和"device_map"命令查看环路中故障磁盘之前的内容。

  • 如果启动程序请求的读取操作被磁盘(待读取)与启动程序(存储器适配器)之间路径上的设备损坏、则会发生运行不足 错误。在对不断增加的运行不足错误进行故障排除时、请在报告错误的设备之后检查设备;可能损坏的大部分数据流都将从磁盘读取到启动程序。

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