Kickstart UEFI install DVD media check

boydhako · 12-31-2021, 07:23 AM

Anybody know of anything special you have to do; or point me to some web pages, on creating Kickstart Install DVDs for UEFI? I created a kickstart install and it works in BIOS VMs in VMware Fusion. However, if I switch the firmware to UEFI without SecureBoot I get the attached screenshot.

colorpurple21859 · 12-31-2021, 09:46 AM

Does it boot if media check is skipped?
Without any information on how the dvd iso was created or what tutorial used, assuming iso was created from files of an installation dvd:

for mkisofs add this to the end for EFI
-eltorito-alt-boot -eltorito-platform 0xEF -eltorito-boot boot/syslinux/efiboot.img -no-emul-boot

for irrosis
-eltorito-alt-boot -eltorito-boot -e boot/syslinux/efiboot.img -no-emul-boot

computersavvy · 12-31-2021, 06:13 PM

Running a media check on an image that has been altered will always fail. The checksum does not match the original image.

boydhako · 12-31-2021, 09:48 PM

Quote:

Originally Posted by colorpurple21859

Does it boot if media check is skipped?
Without any information on how the dvd iso was created or what tutorial used, assuming iso was created from files of an installation dvd:

for mkisofs add this to the end for EFI
-eltorito-alt-boot -eltorito-platform 0xEF -eltorito-boot boot/syslinux/efiboot.img -no-emul-boot

for irrosis
-eltorito-alt-boot -eltorito-boot -e boot/syslinux/efiboot.img -no-emul-boot

Doesn't even get to the point of selecting to do the check or not in the boot menu. The commands I'm using is below. Don't suppose you explain the eltorito thing?

# mkisofs -o /opt/build_image/rhel8.5-DISA_STIG-rhel8-V1R4-1.iso -b isolinux/isolinux.bin -joliet-long -R -l -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot -e images/efiboot.img -no-emul-boot -graft-points -V "RHEL-8-5-0-BaseOS-x86_64" .

# isohybrid --uefi /tmp/test.iso

colorpurple21859 · 12-31-2021, 10:40 PM

the differences between the two, other than the location of the efiboot.img, for efi booting is I also included the following:

-eltorito-platform 0xEF -eltorito-boot

I don't know what it does, I just know this is what it took to get a self-made iso I was working on a couple of years ago to boot in efi mode.

I think isohybrid is to allow the iso to boot when put onto a usb.