root:/# grub-mkdevicemap --device-map=device.map
root:/# cat device.map
(hd0)	/dev/sda
(hd1)	/dev/sdb
root:/#
root:/# logout
[root@HOST_SYSTEM ~]# mount|grep lfs
/dev/sdb1 on /mnt/lfs type ext3 (rw)
/dev on /mnt/lfs/dev type none (rw,bind)
devpts on /mnt/lfs/dev/pts type devpts (rw)
shm on /mnt/lfs/dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
proc on /mnt/lfs/proc type proc (rw)
sysfs on /mnt/lfs/sys type sysfs (rw)