I need to boot a DELL R320 server from a USB (3.0) disk drive with Ubuntu 14.04 Server. With a USB pen flash (LiveCD) it boots correctly but with the USB disk it says there is no bootable device.

Using that same disk in a laptop I'm able to boot.

This is odd. Does anybody succeeded to boot with an external USB disk drive? Any suggestion?


Reboot computer, press F2 to came BIOS. Find "Boot Options" Enable USB Boot


Reboot, press F12 key. Choose USB Drive

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  • USB was already enabled and the disk was detected. I can could see that the server tried to boot with the external disk but it said there was no bootable device. – bitcraft Mar 18 '15 at 16:52
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    I managed to boot with a different approach: - I choose to boot through UEFI, instead of through BIOS. Saved configuration and rebooted. - Then, during boot time I press F11 to bring the UEFI boot menu - Then I added a boot option and choose to boot with /EFI/ubuntu/grubx64.efi This way I'm able to boot with the external drive. Funny enough, I can use that USB drive to boot on my laptop. – bitcraft Mar 18 '15 at 17:00

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