Date: Tue, 31 Jul 2001 14:01:21 -0600 From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: sperber@informatik.uni-tuebingen.de (Michael Sperber [Mr.\ Preprocessor]) Cc: Martin Kraemer <Martin.Kraemer@Fujitsu-Siemens.com>, Matt Dillon <dillon@earth.backplane.com>, konecny@web.markiza.sk, freebsd-stable@FreeBSD.ORG Subject: Re: Continuing ahc problems - also cause fxp failure Message-ID: <200107312001.f6VK1LI38284@aslan.scsiguy.com> In-Reply-To: Your message of "31 Jul 2001 14:00:58 %2B0200." <y9lae1lcnph.fsf@informatik.uni-tuebingen.de>
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>I see an identical problem with and without this diff applied on an >ASUS motherboard with onboard SCSI. No onboard Ethernet. Your problem is actually quite different. In your case, the timeout occurs in a data-out phase and the chips status tells us: 1) The target still has us in data phase. 2) SCSI dma is still enabled. 3) Our data fifo is full of data to send on the SCSI bus, but its not going anywhere. So, the aic7890 believes that the target has stopped requesting more data, but we still haven't changed phase. This is the classic symptom of a flaky bus where the signals for clocking data are degraded. The target probably didn't see one or more of the controller's ACKs, so we are stuck. Double check your termination, cabling, power supply, etc, etc. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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