The devices file looks correct. This is a difficult problem...
Is the usb-storage driver loaded when you plug in the drive?
Is CONFIG_USB_LIBUSUAL enabled in your kernel config?
Can you build your own kernel for testing? If you can, enable
CONFIG_USB_DEBUG and let's see what shows up in the dmesg log.
CONFIG USB LIBUSUAL is not set, neither is USB DEBUG. I might be able to compile
my own kernel within a few days, no internet access right now.
usb storage module gets loaded when i plug the device, but i also tried to
modprobe it before i plug it in.
Thanks for your efforts.