I haven't experienced it, not yet anyways.
Considering the whole system gets halted, I'm not sure it is due to any particular storage integration, but PERCSAS2 generally imply driver issues with the storage. That said, I'd check if the Nimble integration package was the latest available for your OS and compatible with the firmare version used on Nimble.
The mass hangout on storage may be the result of malfunctioning networking connection, too, where all outstanding I/O has to be queued up and that leads to additional resources consumption and ultimate crash of the services. Might be just another area to check.
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