Red Hat Enterprise Linux 6 installation failed to add a boot entry duplicately for UEFI environment with multipath boot partition

Issue

• We are trying to install Red Hat Enterprise Linux 6.6 on the new UEFI system.
• This system is using boot from SAN technology so the boot disk is located on the LUN on EMC storage.
• There are two paths to the LUN:

mpatha (3600601600f3133xxxxxxxxxxxxxxxxxx) dm-0 DGC,VRAID
size=32G features='0' hwhandler='1 emc' wp=rw
|-+- policy='round-robin 0' prio=1 status=active
| `- 0:0:0:0 sda 8:0   active ready running
`-+- policy='round-robin 0' prio=0 status=enabled
  `- 0:0:1:0 sdh 8:112 active ready running

• In the program.log we can see the anaconda install efibootmgr successfully over the sda path but when the same is done using the non-active sdh path the efibootmgr fails as it can't read the partition information from /dev/sdh disk:

XX:XX:XX,488 INFO    : Boot001C* Red Hat Enterprise Linux 6
XX:XX:XX,489 INFO    : Running... ['efibootmgr', '-c', '-w', '-L', 'Red Hat Enterprise Linux 6', '-d', '/dev/sdh', '-p', '1', '-l', '\\EFI\\redhat\\grub.efi']
XX:XX:XX,517 ERROR   : ** Warning ** : Boot001C has same label Red Hat Enterprise Linux 6
XX:XX:XX,517 ERROR   : Error: no partition information on disk /dev/sdh.
XX:XX:XX,518 ERROR   :        Cowardly refusing to create a boot option.

• This problem did not occur on the sames systems with legacy-mode installation or when installing to local drive in UEFI mode.