> > If I give the root password, I can find no /dev/sda1. However, mount shows > /dev/sda1 on /, and there *is* a /sys/block/sda folders, with a sda1 folder > in that as well. It's almost like it had /dev/sda1, but then lost it > somehow. > > Does anyone have any idea what's going on here? Any help would be > appreciated.
This may be a problem with the order of disks. If there is a harddisk and a USB, which one is recognized as sda1? I guess that can even depend on the BIOS settings. Then there are differences between different versions of Grub (but you already manged the Grub setup). I came to the following solution for me to make things more easy: I put Grub always on the harddisk. I have a little linux partion only for the purpose to configure Grub. So it's unambiguously that the harddisk is the first disk and that Grub is on the first disk. Now I can freely experiment on all other partitions and disks. I never install a bootloader on those other partitions. Sure that doesn't work for a rescue system when the harddisk is broken. In that case I would use any live CD. Al