su
Password:
linux:/home/papa # ls -al /dev/usbscanner
crw-------    1 papa     root     180,  48 2002-09-09 22:25 /dev/usbscanner
linux:/home/papa # ls -al /dev/usb/scanner0
crw-------    1 papa     root     180,  48 2002-09-09 22:25 /dev/usb/scanner0
linux:/home/papa # sane-find-scanner
# Note that sane-find-scanner will find any scanner that is connected
# to a SCSI bus and some scanners that are connected to the Universal
# Serial Bus (USB) depending on your OS. It will even find scanners
# that are not supported at all by SANE. It won't find a scanner that
# is connected to a parallel or proprietary port.

sane-find-scanner: found USB scanner (vendor = 0x04a9, product = 0x2204) at device /dev/usb/scanner0
sane-find-scanner: found USB scanner (vendor = 0x04a9, product = 0x2204) at device /dev/usbscanner
linux:/home/papa # scanimage -L
device `canon630u:/dev/usb/scanner0' is a CANON Canoscan FB630U flatbed scanner
device `canon630u:/dev/usbscanner' is a CANON Canosca