I have now partially working my migration hardware (some problems with the second controller, which disconnect the disks connected to it after a while with the log message "Drive Plugged out"). Thread here:    Now let's say that I want to update from Jun's loader 1.04b 918+ BAREMETAL to ARC.   I investigated how to do it in the "official way" (meaning, real Synology hardware), and I found this page: https://kb.synology.com/en-ph/DSM/tutorial/How_can_I_update_to_the_late