Problem installing RHEL on HP Itanium Server

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http://unix.stackexchange.com – When I am trying to install RHEL (6.3, 5.8, 4.8) on an HP Integrity Server rx2660 Itanium with 4GB RAM, I keep getting to the same point which is Loading file efi\boot\initrd.img...done After that nothing happens and I can’t continue installing RHEL. Also, when I hit Ctrl + Alt + F3, I see the message Unable to identify CD-ROM format unable to load NLS charset utf8 and the SCSI CDROM fails to mount CD/DVD? (HowTos)