How to boot the system from the alternate VG after OS disk cloning?

Solution Unverified - Updated -

Issue

  • OS disk has been cloned and presented to the server and now the root partition from the cloned LUN is mounting instead of original LUN after reboot.
  • Server is booting randomly in two different LUNS. One is the main OS LUN the other one is a SAN cloned LUN from the main one.

Environment

  • Red Hat Enterprise Linux (RHEL) 6

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