Reset back to:
option overlay_root /overlay

And may try this method:

  1. The installation directory of the opkg plugins in /usr/lib/opkg/
  2. Copy the opkg plugins folder to the external disk, example:
    cp -r /usr/lib/opkg/ /tmp/mountd/disk1_part1
  3. Create a sym-link at the path of the original opkg plugins folder, point to the new opkg folder in the external disk. Bring the system to find the new path of the opkg:
    ln -s /tmp/mountd/disk1_part1 /usr/lib/opkg
  4. Reboot
1 Like