grub rescue> set
prefix=(hd0,msdos5)/boot/grub
root=hd0,msdos5
grub rescue> ls
(hd0) (hd0,msdos1) (fd0)
grub rescue> set debug=partition
grub rescue> ls
(hd0) partmap/msdos.c:91: partition0: flag 0x0, type 0x7, start 0x800, len 0x65cc800
partmap/msdos.c:91: partition1: flag 0x0, type 0x5, start 0x65cd7fe, len 0x1160b002
partmap/msdos.c:91: partition2: flag 0x0, type 0x0, start 0x0, len 0x0
partmap/msdos.c:91: partition3: flag 0x0, type 0x0, start 0x0, len 0x0
(hd0,msdos1) (fd0)
grub rescue>