Isolation of drive causing redundancy mismatch is MEL event type 2046. Isolation of drive causing redundancy mismatch is a data parity mismatch for which the controller firmware can isolate the mismat...Isolation of drive causing redundancy mismatch is MEL event type 2046. Isolation of drive causing redundancy mismatch is a data parity mismatch for which the controller firmware can isolate the mismatch to a single drive. Typically if a drive has been isolated it can be replaced, however, we do want to perform troubleshooting first. For additional troubleshooting steps, check out the E-Series Isolation of drive causing redundancy mismatch - AutoSupport Message article.