Reference:
http://www.uelastix.com/
NOT WORK!!
wget http://liquidtelecom.dl.sourceforge.net/project/elastix/Elastix%20PBX%20Appliance%20Software/2.4.0/elastix-arm-2014-01-30.tar
tar xvf elastix-arm-2014-01-30.tar
fdisk /dev/sdb
d ;delete a partition
n ;add a new partition
p ;primary
1 ;Partition number
(default) ;First sector
653311 ;Last sector
t ;change a partition's system id
e ;Hex code
n ;add a new partition
p ;primary
2 ;Partition number
(default) ;First sector
3930111 ;Last sector
n ;add a new partition
p ;primary
3 ;Partition number
(default) ;First sector
(default) ;Last sector
w
mkfs.vfat -n '/BOOT' /dev/sdd1
mkfs.ext3 -L '/usr' /dev/sdd2
mkfs.ext3 -L '/' /dev/sdd3
mount -o uid=1000,gid=1000 /dev/sdb1 /mnt
tar -C /mnt -xzf BOOT.tar.gz
umount /mnt
mount /dev/sdb2 /mnt/
tar -C /mnt/ -xzf usr.tar.gz
umount /mnt
mount /dev/sdb3 /mnt/
tar -C /mnt/ -xzf root.tar.gz
umount /mnt