Odd ada(4) failures when trying using USB scanner

Michael Reifenberger mike at reifenberger.com
Wed Feb 3 21:38:09 UTC 2010

On Wed, 3 Feb 2010, Alexander Motin wrote:
>>> I would say that scanner application tries to probe all CAM devices,
>>> looking for scanner. While doing it, it uses SCSI/ATAPI commands with
>>> odd-sized transfer sizes. It causes errors from ata(4) and triggers bug
>>> in IXP700 AHCI controller. Odd-sized requests are generally not
>>> supported by ATA/SATA. Second problem is in work now.
>> Could odd-sized commands be prohibited/ignored by the driver then?
> I've recently committed patch to 9-CURRENT, that should block sending of
> SCSI commands to non-ATAPI devices. That should fix your problem.

I'm currently running HEAD @ r203376 and it fixed my problem already.

Thanks for your work!

Michael Reifenberger
Michael at Reifenberger.com

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