Michael Sperber [Mr. Preprocessor] (sper...@informatik.uni-tuebingen.de)
Aug 2, 2001 9:57:21 am
"Justin" == Justin T Gibbs <gib...@scsiguy.com> writes:
I see an identical problem with and without this diff applied on an
ASUS motherboard with onboard SCSI. No onboard Ethernet.
Justin> Your problem is actually quite different. In your case, the timeout
Justin> occurs in a data-out phase and the chips status tells us:
Justin> 1) The target still has us in data phase.
Justin> 2) SCSI dma is still enabled.
Justin> 3) Our data fifo is full of data to send on the SCSI bus,
Justin> but its not going anywhere.
Justin> So, the aic7890 believes that the target has stopped requesting
Justin> more data, but we still haven't changed phase. This is the classic
Justin> symptom of a flaky bus where the signals for clocking data are
Justin> degraded. The target probably didn't see one or more of the controller's
Justin> ACKs, so we are stuck. Double check your termination, cabling, power
Justin> supply, etc, etc.
Thanks for the comments. I just checked once again, and everything
seems to be in order. I decided to ax the active terminator and run
in S/E mode which has been working fine for >24h. Crossing my fingers
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla
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