When troubleshooting SAN performance problems, a key indicator of a physical issue is a high CRC

(Cyclic Redundancy Check) error count. CRC errors are indicative of corrupt data packets during

transmission, which often points to issues such as faulty cables, bad ports, or other physical

problems in the network infrastructure. High CRC error counts can lead to retransmissions, reduced

throughput, and overall degradation of SAN performance. Addressing the physical components

associated with high CRC error counts is essential for restoring optimal SAN operations.

Reference:

While the specific Dell XtremIO Design document was not available, general SAN troubleshooting

guidelines and best practices indicate that CRC errors are a critical metric to monitor for physical

connectivity issues1.

Additional resources on SAN performance troubleshooting can be found in the support

documentation for the XtremIO Family on Dell’s official website2.

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