Adding new LUNs to a system with kernel >= 2.6.32-494 causes extreme load and udev issues

Solution Verified - Updated -

Issue

Mapping new LUNs to the physical systems cause extreme load (200/300+) on the server, inaccessibility of the SAN LUNs and in cases where the host is part of a cluster, this will cause qdiskd to be unable to write to the disk, passing the timeouts, causing eviction.

Environment

  • Red Hat Enterprise Linux 6.6
  • Kernel >= 2.6.32-494
  • Red Hat Cluster with quorum disk

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