@mitu said in How to boot from USB pendrive:

@pscotto1234 said in How to boot from USB pendrive:

distro Android based on te USB pendrive.

I'm not sure how that works or if the bootloder on the EEPROM supports booting an Android image directly. Does the image work if you boot it from the sdcard ?

Yes, it boots fine.

@mitu said in Pi4 - How can safe remove USB Pendrive ??:

You can exit EmulationStation and then, from the command line, run

sudo umount /media/usb0

If your USB drive is mounted on another folder than /media/usb0, substitute /media/usb0 with the proper folder name.

It's apparently the best solution... what i have do:
F4 to exit from ES.
mount (to found corrent usb)
used sudo umount
copyed all my news roms from pc and now also the image snap and some gamelist.xml from my personal system
type exit from console to restart es and....

all now works whitout any issue.

Thanks for all.

@mppsan If the system you're copying to has also RetroPie, chances are the system is loading you USB pendrive in the ROMs folder and you're just re-copying the files on the usb. Disable the USB mount service from the RetroPie-Setup script and then mount the USB pendrive manually from the command line.

@lostless nahh, im not using filters i am aware of that, i have my pi hooked up to a crt direcly, i just have my boot config modified, so i have menus ate 480p and that switch for game to 240p. something like this https://retropie.org.uk/forum/topic/8476/retropie-240p-15-khz-rgb-scart-tv-guide/2

Mounting manually to:
"sudo mount /dev/sda1 /media/usb" (instead of usb0)
and restarting emulationstation doesn't trigger USB ROM Service as well.

Also checked other pen drive. Same issue. Checked same raspberry pi with other OS on other card (OSMC). No issue. It's strictly Retropie OS issue!