ReaR: Unable to create a bootable USB media in UEFI mode

Solution Verified - Updated -

Issue

  • When using OUTPUT=USB to create a bootable USB media in UEFI mode, the following error messages are seen

    # rear -v mkrescue
[...]
Created initrd.cgz with gzip default compression (215276422 bytes) in 14 seconds
ERROR: Could not copy /tmp/rear.yHHZPnlChfh43YH/tmp/initrd.cgz to /tmp/rear-efi.H9rRB//EFI/BOOT/initrd.cgz
Aborting due to an error, check /var/log/rear/rear-mysystem.log for details

Environment

  • Red Hat Enterprise Linux
  • rear

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