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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?

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

Save.

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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