For some reason i was not able to mount a sata drive with external power on the MOI+..
When i rebooted the MOI the boot process got stuck at 'starting kernal" also after unplugging the sata drive and reboot still the same message appeared.
Next step was to recover the moi by reloading the software and firmware from a usb drive.
I still wanted to use the drive so i formatted the drive on a different device (EXT4). Mounted the drive in a powered external casing and pugged in the usb slot.
On the display of the moi it showed that a SATA drive was mounted
.
It works fine now.