Установка CentOS 5 - GRUB установлен на Карте памяти

вытяните usb, терпят и работают

# grub-install --recheck '(hd0)'
Probing devices to guess BIOS drives. This may take a long time.
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0)   /dev/fd0
(hd0)   /dev/sda

выберите свое устройство и повторно выполнитесь (только если оно не было распознано как hd0),

# grub-install '(hd0)'
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

# this device map was generated by anaconda
(hd0)     /dev/sda