grml bootfrom=removable Restrict search for the live media to removable type only.
grml bootfrom=removable-usb Restrict search for the live media to usb mass storage only.
grml isofrom=/dev/sda1/grml.iso Use specified ISO image for booting
grml bootfrom=removable Restrict search for the live media to removable type only.
grml bootfrom=removable-usb Restrict search for the live media to usb mass storage only.
grml isofrom=/dev/sda1/grml.iso Use specified ISO image for booting