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I have Ubuntu 12.04 installed on a bootable USB drive. It works well with 2 laptops (meaning, laptops boot successfully off the USB drive). However, when I connect the USB drive to a HP EliteBook 8540w I get the following message:

hd0 out of disk grub rescue>

Why does it even check hd0?? I went over all the BIOS options and couldn't find anything obvious to cause it. To be clear, I did change the boot order in the BIOS to USB device first.

I found a post (can't remember where...) that explained how to recover from grub rescue and the following commands work for me and allow me to boot off the USB drive: set prefix=(hd1,msdos1)/boot/grub set root=(hd1,msdos1) insmod linux linux /vmlinuz root=/dev/dsb1 initrd /initrd.img boot

But I don't really want to type this every morning when I boot up my laptop :-(

Any ideas?

Thanks, Tom

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  • I'll be interested to know the answer to this. I also have Ubuntu booting off USB - it works, but I do get that message
    – frymaster
    Apr 4 '14 at 13:06

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