grub> root (hd0,
 Possible partitions are:
   Partition num: 0,  Filesystem type unknown, partition type 0x7
   Partition num: 1,  Filesystem type is ext2fs, partition type 0x83
   Partition num: 2,  Filesystem type unknown, partition type 0x82
   Partition num: 4,  Filesystem type is fat, partition type 0xc