There is currently only one software package on the market that can instantly diagnose your problem. It is called...
SANScreen from Onaro. It is a bit pricey and typically only cost justifies for SANs larger than 128 ports.
You can also contact your server, HBA, multipath software, FC switch or target storage vendor for troubleshooting help.
Dig Deeper on Fibre Channel (FC) SAN
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