df
fdisk /dev/sda
reboot
umount -f /mnt/sda1
mke2fs -t ext4 /dev/sda1
mkdir -p /mnt/sda1
mount /dev/sda1 /mnt/sda1
mkdir -p /tmp/cproot
mount --bind / /tmp/cproot
tar -C /tmp/cproot -cvf - . | tar -C /mnt/sda1 -xf -
umount /tmp/cproot
nano /etc/config/fstab
...
config mount
option target /
option device /dev/sda1
option fstype ext4
option options rw,sync
option enabled 1
option enabled_fsck 0
reboot
df