with ignore_bootid:
 * Searching for GRML file, this might take a few seconds...
 * Mounted live system from /dev/loop0
mount: mounting /dev on /root/dev failed: No such file or directory
mount: mounting /sys on /root/sys failed: No such file or directory
mount: mounting /proc on /root/proc failed: No such file or directory
Target filesystem doesn't have /sbin/init.
/init: line 229: 6: Bad file descriptor