suse 9.1 - scanner vobis highscan io-fehler

hallo
mein scsi scanner ist an einem scsi controller angeschlossen, der eine scsi-festplatte ohne probleme bedient. (SYMBIOS PCI SCSI ADAPTER 53C810, bei yast-hardware als festplattencontroller eingerichtet) Die dem scanner beigelegte schnittstellenkarte habe ich nicht benutzt. Wenn ich den scanner bei yast-hardware-scanner anmelde, bekommt er die zuordnung /dev/sg10. Wenn ich ihn danach mit xsane anspreche, findet er das scanner-device. Das scanner-ding ruckelt und brummt auch eine minute. Dann kommt der io-fehler. Bei der device selection von xsane 9.2 bietet er eine liste von 64 scannern an, von microtek:/dev/sg64 bis sg01. Den device sg10 kann ich gar nicht anklicken, weil er außerhalb des bildschirmes ist, keinen rollbalken hat. Beim zweiten versuch mit sane findet er kein scanner device mehr, er schlägt solche lösungsmöglichkeiten vor - the backend is not loaded by sane – the backend is not configured correct. Damit kann ich nichts anfangen. Ich vermute das problem an der stelle, dass linux 64 verschiedene scanner entdeckt. Und es ist seltsam, jedes über yast-hardware angemeldete ding ist beim wiederholten aufruf von yast-hardware noch da. Der scanner ist nach anmeldung im yast-hardware beim nächsten reinschauen wieder verschwunden.
gleiches system samt scanner läuft unter WIN98SE ohne mucken.
wer kann mir einen tip geben?

ich reiche noch nach ein konsolprokoll, nach lesen vom howto
linux:/home/advocatus # scanimage -L
device `microtek:/dev/sg60' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg59' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg58' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg57' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg56' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg55' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg54' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg53' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg52' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg51' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg50' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg49' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg48' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg47' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg46' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg45' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg44' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg43' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg42' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg41' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg40' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg39' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg38' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg37' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg36' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg35' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg34' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg33' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg32' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg31' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg30' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg29' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg28' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg27' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg26' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg25' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg24' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg23' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg22' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg21' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg20' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg19' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg18' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg17' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg16' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg15' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg14' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg13' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg12' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg11' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg10' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg9' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg8' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg7' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg6' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg5' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg4' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg3' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg2' is a Microtek ScanMaker E3 flatbed scanner
device `microtek:/dev/sg1' is a Microtek ScanMaker E3 flatbed scanner
linux:/home/advocatus # sane-find-scanner

found SCSI scanner " Scanner 1.80" at /dev/sg1
found SCSI scanner " Scanner 1.80" at /dev/sg2
found SCSI scanner " Scanner 1.80" at /dev/sg3
found SCSI scanner " Scanner 1.80" at /dev/sg4
found SCSI scanner " Scanner 1.80" at /dev/sg5
found SCSI scanner " Scanner 1.80" at /dev/sg6
found SCSI scanner " Scanner 1.80" at /dev/sg7
found SCSI scanner " Scanner 1.80" at /dev/sg8
found SCSI scanner " Scanner 1.80" at /dev/sg9
# Your SCSI scanner was detected. It may or may not be supported by SANE. Try
# scanimage -L and read the backend's manpage.

# No USB scanners found. If you expected something different, make sure that
# you have loaded a driver for your USB host controller and have installed a
# kernel scanner module.

# Scanners connected to the parallel port or other proprietary ports can't be
# detected by this program.
linux:/home/advocatus #

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sane version 1.0.13 - was ist eine backend's manpage ?
ich bin noch neu in linux-sachen, deshalb bitte ich um nachsicht für meine dummen fragen.