[hd51] /var/root # ofgwrite -n -r -k /media/sda1/hd51/

ofgwrite Utility v3.9.7
Author: Betacentauri
Based upon: mtd-utils-native-1.5.1 and busybox 1.24.1
Use at your own risk! Make always a backup before use!
Don't use it if you use multiple ubi volumes in ubi layer!

Flashing rootfs
Flashing kernel
Searching image files in /media/sda1/hd51/ resolved to /media/sda1/hd51
Found kernel file: /media/sda1/hd51/kernel.bin
Found rootfs file: /media/sda1/hd51/rootfs.tar.bz2
Found EXT4 rootfs
Found mounted /newroot
Found mounted /newroot

Determine current rootfs
Current rootfs is: /dev/mmcblk0p5
Execute: fdisk -l
Found valid GPT with protective MBR; using GPT

No matching partition names are found. Use current kernel and rootfs devices
Using current multiboot partition 2
Using /dev/mmcblk0p4 as kernel device
Using /dev/mmcblk0p5 as rootfs device

Syncing filesystem
Flashing kernel ...
Successfully flashed kernel!
Untar: tar xf /media/sda1/hd51/rootfs.tar.bz2
Successfully flashed rootfs! Rebooting in 3 seconds...