device-mapper-multipath fails to set fast_io_fail_tmo/dev_loss_tmo on Red Hat Enterprise Linux 6

Solution Verified - Updated -


  • When fast_io_fail_tmo/dev_loss_tmo is specified in multipath.conf, multipath/multipathd fails to set the specified value to appropriate rport.

  • As a result, I/O may not return to upper layer when a path is down.


  • Red Hat Enterprise Linux 6 Snapshot8 (upstream bug)
  • device-mapper-multipath-0.4.9-23.el6 and earlier

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