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I have an ISO image of my backup solution's recovery cd. When I burn the image to a CD-ROM, I can boot from it in UEFI or normal mode without problems.

Unfortunately, this is no solution for my laptop, as it does not have an optical drive. Thus, I tried to create a bootable USB stick that can also boot in UEFI mode, but so far I have not been successful (note that the laptop has UEFI and boots Windows 7 in UEFI mode).

So my question is, if anyone knows how I can get said ISO on my USB stick so that it boots as if I would use a CD-ROM?

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What process are you using to create the bootable USB stick. –  Ramhound Nov 1 '12 at 13:57
    
I have searched for some tools to create bootable USB sticks (Unetbootin, Rufus, make_me_bootable among others). But either they weren't able to create a bootable USB stick at all, or it was only bootable in normal and not UEFI mode. –  shiin Nov 1 '12 at 14:04
    
Related / dup: superuser.com/questions/531793/… –  ripper234 Apr 16 '13 at 7:47
    
The guys at eightforums has a good step by step ---> here –  TheCompander Aug 26 '13 at 4:14
    
Perhaps it would be simplier to change the bios from uefi to Compatibility Support Mode (CSM) –  user284802 Dec 26 '13 at 22:56

3 Answers 3

Please clarify: can you boot that CD in both BIOS and UEFI modes? E.g. does it have two boot records in boot menu or a mode switch knob?

Preparing a UEFI-bootable USB flash drive is actually way simpler compared to an ISO, at least has been so in my experiments: a FAT partition with EFI/BOOT/BOOTX64.EFI which knows what to do next compared to specially crafted El Torito boot floppy image with the same crap.

Maybe you'll need to extract that efiboot image, mount -o loop it and extract the contents into EFI/BOOT directory.

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Rufus supports BIOS and UEFI systems.

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You should be able to simply format the flash drive as FAT32 and copy the contents of the ISO to it.

I believe that you don't need any further steps.

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unfortunately not; even if I make the partition active –  shiin Nov 1 '12 at 14:16

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