Error 11: Unrecognized device string в grub 1

Доброго времени суток.
Есть такая проблема - при попытке загрузить Mandriva выдаёт ошибку.
uuid sda8: cec3a1a7-e421-41cf-b1f2-0d4bf8baabff

title Ubuntu 9.04, kernel 2.6.28-11-generic
uuid 7b6b2eee-4ce8-4ac9-8241-3986a1d20891
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=7b6b2eee-4ce8-4ac9-8241-3986a1d20891 ro quiet splash
initrd /boot/initrd.img-2.6.28-11-generic
quiet

#title Ubuntu 9.04, kernel 2.6.28-11-generic (recovery mode)
#uuid 7b6b2eee-4ce8-4ac9-8241-3986a1d20891
#kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=7b6b2eee-4ce8-4ac9-8241-3986a1d20891 ro single
#initrd /boot/initrd.img-2.6.28-11-generic

#title Ubuntu 9.04, memtest86+
#uuid 7b6b2eee-4ce8-4ac9-8241-3986a1d20891
#kernel /boot/memtest86+.bin
#quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
#title Other operating systems:
#root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title Microsoft Windows XP Home Edition RU
rootnoverif (hd0,0)
savedefault
makeactive
chainloader   +1


title Mandriva
root hd(0,7)
kernel /boot/vmlinuz root=/dev/sda8
initrd /boot/initrd.img root=/dev/sda8
quiet