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"LUN assignments on this target have changed" kernel warning messages after LUN reconfiguration at storage array.

Solution Verified - Updated -

Issue

  • Should I be concerned about messages indicating "LUN assignments on this target have changed"?
  • Whenever LUNs are reconfigured on the storage array, the kernel reports the following warnings:
kernel: sd 1:0:5:58: Warning! Received an indication that the LUN assignments on this target have changed. 
The Linux SCSI layer does not automatically remap LUN assignments.

Environment

  • Red Hat Enterprise Linux 5 update 6 (kernel-2.6.18-238 or above)
  • Red Hat Enterprise Linux 5 update 5 (kernel-2.6.18-274)
  • Red Hat Enterprise Linux 6 (kernel-2.6.32-71 or above)

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