"You have not created a /boot/efi partition" is prompted when it's tried to install Red Hat Enterprise Linux 6 on BIOS RAID with UEFI

Solution Unverified - Updated -

Issue

  • "You have not created a /boot/efi partition" is prompted on installation of Red Hat Enterprise Linux 6.
  • The system has a BIOS RAID (RAID1), and UEFI is enabled on BIOS.
  • I created custom layout include "boot/efi", "/" and "swap". (not /boot)
  • This issue was not observed with auto-partition
  • This issue was not observed when install RHEL6 on non-RAID HDD

Environment

  • Red Hat Enterprise Linux 6

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