Multipath does not use preferred paths on NetApp LUNs

Solution Verified - Updated -

Issue

  • We've been using the multipath configuration for proper ALUA accces on NetApp disks. However our storage team noticed that there are significant traffic generated on non-preferred paths even the priority of multipath seems all correct.

Environment

  • Red Hat Enterprise Linux (RHEL) 6 U3
  • Device mapper multipath

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