Pogoplug v4 usb image (no replies)

a friend gave me his pogoplug but didnt have the usb drive he was booting from
i need a bootable usb drive image i can start with
all the pogoplug does is the green led flashes

he told me he had it set to boot from the usb drive
so im guessing its looking for a boot image from the usb

its not pulling an ip from the dhcp server so im pretty sure its not booting


thanks for any help