I wanted to install Ubuntu 10.10 onto a 16Gig USB key and did so by booting with a Live CD and doing the install to /dev/sdc1 (which is the USB key).
It installed fine to the USB but it also installed grub MBR to /dev/sda1 (doh!) .. so now I can't boot into my main HD unless I have the USB key plugged in and I select the correct kernal on /dev/sdc1 to load from on the grub boot menu. If I try booting without the USB key I get...
error: no such device: <long device id number here>
grub rescue> _
Um... so how do restore my MBR on /dev/sda1?
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