Meanwhile....
If you need to update or flush the S4 firmware, and received this error message
cp: omitting directory 'SD'
Please turn off the S4.
Please open the top cover and remove the microSD card inserted into the Beagle Bone Black unit
Power it back on and log into the web control panel then try to flush with the new firmware.
I don't get it? I assuming by flush you mean flash. You're saying to remove the sd card and power the S4 without it in? How would we log back into it and flash it without the sd card?