How can mount the internal flash from image on external flash by multiboot such as BarryAllen ?!
Code
root@dm920:~# cat /proc/cmdline | grep "root=" | awk -F "root=" '{print $2}' | cut -d " " -f1
/dev/mmcblk0p2
root@dm920:~# umount -l /dev/mmcblk0p2
umount: can't unmount /dev/mmcblk0p2: Invalid argument
root@dm920:~# mount -t ext4 -o rw /dev/mmcblk0p2 /mnt
mount: mounting /dev/mmcblk0p2 on /mnt failed: Device or resource busy
And Then .. Is this correct command to Flash new image by telnet command ?!!
Code
xz -d -c /media/hdd/backup/image.tar.xz > /mnt
flash-kernel /mnt/boot/zImage*dm920
sync
umount -l /mnt
reboot
Thank you