Date: Tue, 18 Feb 1997 02:32:26 -0800 From: David Greenman <dg@root.com> 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 Message-ID: <199702181032.CAA05275@root.com> In-Reply-To: Your message of "Tue, 18 Feb 1997 06:21:58 -0400." <Pine.BSF.3.95.970218062021.23132e-100000@thelab.hub.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
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