Limiting path failover time for SCSI devices

Solution Verified - Updated -

Issue

  • A storage fault causes the SCSI error handler (scsi_eh) threads to spend a long time attempting to recover before failing over to other available paths.

Environment

  • Red Hat Enterprise Linux 5.10.z kernel kernel-2.6.18-371.6.1.el5 or newer
  • Red Hat Enterprise Linux 6.4.z kernel kernel-2.6.32-358.32.3.el6 or newer
  • SCSI devices in a multipath configuration
  • Storage faults that cause IO to time out on external storage
  • Red Hat Enterprise Linux 7

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