this line in the linked article has caused confusion as not being able to boot from sd again..
""Once this bit has been set, the SD card is no longer required. Note that any change you make to the OTP is permanent and cannot be undone.""
BUT that is not the case you can still boot from sd.
What this does is enable boot from usb, it checks if there's a sd card and will boot from that first if available ..then checks for usb device if no sd card is found
you can have only one usb mass storage device plugged in to boot from usb, more than that it wont boot from my experience..this does NOT affect other usb devices sdr, wifi, ect.
so it wont boot from usb if two thumb drives are plugged in at boot time..even if one has the os and one is used for external storage, after boot you can plug in the the external storage to use it..
"Note than for an RPi2 not V1.2, boot from USB seems NOT possible."
it is possible but needs something like berryboot on an sd card. i used that on the first gen pi's.
but i wouldn't suggest using the older boards for op..
""Once this bit has been set, the SD card is no longer required. Note that any change you make to the OTP is permanent and cannot be undone.""
BUT that is not the case you can still boot from sd.
What this does is enable boot from usb, it checks if there's a sd card and will boot from that first if available ..then checks for usb device if no sd card is found
you can have only one usb mass storage device plugged in to boot from usb, more than that it wont boot from my experience..this does NOT affect other usb devices sdr, wifi, ect.
so it wont boot from usb if two thumb drives are plugged in at boot time..even if one has the os and one is used for external storage, after boot you can plug in the the external storage to use it..
"Note than for an RPi2 not V1.2, boot from USB seems NOT possible."
it is possible but needs something like berryboot on an sd card. i used that on the first gen pi's.
but i wouldn't suggest using the older boards for op..