F7 uses libata now, same as SATA, for all drives, even PATA drives, which means that all drives are 'sd' now. Try this: title Fedora Core (2.6.11-1.1369_FC4) root (hd0,0) kernel /boot/vmlinuz-2.6.11-1.1369_FC4 ro root=/dev/hda1 vga=0x31b initrd /boot/initrd-2.6.11-1.1369_FC4.img title Fedora 7 (2.6.21-1.3194.fc7) root (hd1,0) kernel /boot/vmlinuz-2.6.21-1.3194.fc7 ro root=/dev/sdb1 vga=0x31b initrd /boot/initrd-2.6.21-1.3194.fc7.img Same for both fstabs. Good luck!
Yes that did it! I was sceptical because I thought grub took boot info from root (hdX,X) parameter. Thanks Phil