My opinion is: don't stop the array!
Errors are not necessarily caused by heat, probably more a controller or
firmware issue, which will present identically if you restart the
reshaping process.
Also, this kind of issues on my 3ware controller are harmless. You could
better ask this to SCSI people, but there are up to 5 retries (for EACH
scsi command) by the scsi layer after these resets happen.
Stopping the reshape is much more risky imho.
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