From owner-freebsd-hackers  Tue Feb 18 02:31:33 1997
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To: The Hermit Hacker <scrappy@hub.org>
cc: Jason Thorpe <thorpej@nas.nasa.gov>,
        Christoph Kukulies <kuku@gilberto.physik.rwth-aachen.de>,
        freebsd-hackers@freefall.freebsd.org
Subject: Re: ccd and bounce buffers 
In-reply-to: Your message of "Tue, 18 Feb 1997 06:21:58 -0400."
             <Pine.BSF.3.95.970218062021.23132e-100000@thelab.hub.org> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Tue, 18 Feb 1997 02:32:26 -0800
Sender: owner-hackers@FreeBSD.ORG
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>>    There is no dependency that I know of in FreeBSD. Bounce buffers are
>> handled in the generic SCSI layer (via a machine-independant callout), and
>> shouldn't be affected by ccd. I don't know where this rumor got started...
>>
>
>	From personal experience, when I had tried to create a CCD
>device that spanned a PCI/NCR device and an ISA/Adaptec device, the machine
>would consitently "blow up" at boot with an error dealing with Bounce Buffers
>(this was months ago, so I don't recall the exact error message).  
>
>	Putting two PCI/NCR devices in (which she has now) runs beautifully.

   Ahh...see Bruce's message about b_bcount not being initialized properly.
BTW, has anyone fixed this yet?

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project