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Date:      Sat, 16 Jun 2001 10:32:37 -0600
From:      "Justin T. Gibbs" <gibbs@scsiguy.com>
To:        Matt Dillon <dillon@earth.backplane.com>
Cc:        freebsd-stable@FreeBSD.ORG, freebsd-scsi@FreeBSD.ORG
Subject:   Re: Another SCB timeout lockup - this time with console logs! 
Message-ID:  <200106161632.f5GGWbU04297@aslan.scsiguy.com>
In-Reply-To: Your message of "Sat, 16 Jun 2001 08:57:24 PDT." <200106161557.f5GFvOE00563@earth.backplane.com> 

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>    Ok, it happened again.  ahc0 and fxp0 both went poof and started
>    looping on timeouts.  Here is the console log.  I included a bunch
>    of the repetitions.  It repeats forever (I have another 15000 lines I
>    didn't include).

From what I can tell, the aic7xxx card is sitting in a loop waiting
for its DMA of the next transaction to complete.  The fxp driver seems
to have similar problems with burst transfers at the same time.  My guess
would be that the chipset gets wedged somehow, but without chipset
information from ServerWorks, this is going to be a tough nut to crack.
Having a PCI bus analyzer might help as well, assuming there is a slot
on either the bus fxp0 or ahc0 is sitting on.

--
Justin

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