GNU GRUB  version 0.96  (640K lower / 3072K upper memory)
grub> device (hd0) /dev/mapper/hpt37x_ehgjaggaf

grub> root (hd0,5)
Attempt to open drive 0x80 (/dev/mapper/hpt37x_ehgjaggaf)
Filesystem type is reiserfs, partition type 0x83

grub>