grub - Debian setup guesses bad disk mapping between OS and BIOS ?

Vilius · 02-22-2009, 11:30 PM

Hi,

I've just installed Debian 5.0 lenny on my test machine. And was unable to boot. I have centos installed using same config and it boots fine. So I checked /boot/grub/device.map and it was wrong.
So, what I should do now - edit device.map by hand and install grub again using debian setup ? Or install grub natively from boot floppy ?

thanks
Vilius

AwesomeMachine · 02-23-2009, 12:40 AM

You boot with the Debian install CD, and boot the rescue system. Tell it you want a shell, and it will chroot you to the Debian installation. Then you can either edit device.map, or just run grub-install and see what happens. Grub gets device.map wrong frequently enough, that it posts the contents of device.map after it's installed, and asks if it is correct.