# Re: horizontal stripes in your image

Georg Huettenegger (georg@mondoshawan.unix.cslab.tuwien.ac.at)
Sat, 27 Feb 1999 15:40:15 +0100 (CET)

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> Georg Huettenegger wrote:
>
> > > recently I posted a problem with my mustek 12000 sp connected to an adaptec
> > > 1505. In each scanned image I noticed horizontal stripes. First I thought
> > > it's a problem of the beta-version of sane for musteks, but in fact
> > > this is a problem of my scsi-adapter. The solution is, that the correct
> > > scsi-parameters (in my system lilo-parameters) should sound like the following:
> > >
> > > - disconnect: no
> > > - init_sync: no
> > >
>
> > Because it seems that other users have similar problems I would like to
> > ask what could help if the above settings do not help. I have a Symbios
> > Logic 53c810A which works great but the stripes wont go even if I do as
> > recommended above. Only scanning with backtracking turned on helps (but
> > needs 2-3x times longer).
>
> These problems probably refer to completely different scanners!
> The newer 12000SP (denoted by ScanExpress) and the older one
> (MFS-12000SP) have nothing to do with each other. For the SE
> the backtracking switch is simply ignored because the scanner
> doesn't support it. So the second problem report refers to MFS,
> and the first to SE, I guess.
Well you are wright about this. I wrote my mail in a bit of a hurry (with
even poorer english than normal). I have a Mustek Paragon 600 II CD
(MFC-06000CZ v2.03) connected to a Symbios Logic 810A and the problem
occured with the kernel versions 2.0.33/34/35/36, 2.2.1/2. The Zip-drive
and my Yamaha CRW-4260 also connected to the same SCSI-controller work
perfectly so my SCSI-bus should be completely working and as I said
disabling synchronous transfer (which is not enforced by the 8xx driver
normally) and disconnection (although when scanning only the scanner
was active on the SCSI-bus) did not help.
I had the same problem with an Adaptec AVA-1505 but I replaced this
controller and did not try different settings when I used the controller.
Therefore I suspect that the problem may be in the 8xx driver of the Linux
kernel.

> I've got an Adaptec aha1505 and a SE 12000SP but enabling disconnect
> doesn't do any harm for me.
You mean it does not help?

cheers,
Georg Huettenegger

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