Hi kuduku,
Perhaps retracing your steps: if you've created the rootfs as root user? is the pen drive partition Ext3? if you've confirmed these are correct. Try this also: remove the usb_rootfstype env in serial console before booting.
Perhaps retracing your steps: if you've created the rootfs as root user? is the pen drive partition Ext3? if you've confirmed these are correct. Try this also: remove the usb_rootfstype env in serial console before booting.
setenv usb_rootfstype