"multipath: Failing path" and/or 'multipath -ll' shows one or more paths failed on a RHEL 5, 6, or 7 server with device-mapper-multipath

Solution Verified - Updated -

Issue

  • multipath showing paths failed
  • My logs show repeated path failures and I/O is blocking
  • A server is unresponsive and the logs show repeating multipath path failing and SCSI errors
device-mapper: multipath: Failing path 8:0.
device-mapper: multipath: Failing path 8:48.

Environment

  • Red Hat Enterprise Linux (RHEL) 5, 6, or 7
  • device-mapper-multipath

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