Default - selection
root(0,0)
kernel /vmlinuz-2.blabla root=/dev/md2 vga=0x31a splash=silent showopts
initrd /initrd-2.blabla

failsafe
root(0,0)
kernel /vmlinuz-2.blabla root=/dev/md2 vga=normal splash=silent showopts bunch of other options
initrd /initrd-2.blabla


boot broken mirror?
roonoverify (hd0,0)
chainloader +1