How to move root File Systems from a Single Path Device to a Multipath Device?

Solution Verified - Updated -

Issue

  • Have installed a new machine with RedHat 6.5. This installation has been done for boot from SAN in single device. Now, we need to change the boot for SAN in multipath device without reinstall?
  • Have recently installed a RHEL 6 server to boot from SAN which uses a single path. Now, we have added additional path and want this server to make boot from device mapper multipath.

Environment

  • Red Hat Enterprise Linux 6.5
  • Red Hat Enterprise Linux 7

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