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Date:      Tue, 10 Mar 1998 23:16:23 +0100 (CET)
From:      robsch@robkaos.ruhr.de (Robert Schien)
To:        freebsd-scsi@FreeBSD.ORG
Subject:   Re: Scanner support
Message-ID:  <m0yCXJv-000695C@robkaos.ruhr.de>
In-Reply-To: <199803102018.PAA22926@hda.hda.com> from Peter Dufault at "Mar 10, 98 03:18:55 pm"

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> The user level commands don't know how to repackage a command when
> it is split up due to the memory not being physically contiguous
> - it doesn't know the details of the commands so it can't do the
> split properly.  This makes it bad for data transfers.
> 
> Options (if available) are to configure sane to use read/write
> transfers to some device instead for the data transfer, to set it
> to use smaller block sizes (4K will always work), or a questionable
> idea involving hackery to map a buffer to a contiguous address
> using mmap.
> 
Thank you for your explanation.
Unfortunately, this means that there is no possibility to use
SCSI scanners with FreeBSD  at the moment. :-((
It's quite disappointing. :-((

Robert

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