In /boot/grub/menu.lst, I changed "root=/dev/hda1" for "root=/dev/sda1" and it works now. I have two disks in. With another kernel (standard one), fdisk -l shows: /dev/hda1 /dev/sda1 Once I have booted with the new compiled kernel, fdisk -l shows: /dev/sda1... /dev/sdb1 What is happening? Is it related to the second disk? Thanks in advance Hubert