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Date:      Thu, 8 Aug 1996 18:13:08 +0200 (MET DST)
From:      Stefan Esser <se@zpr.uni-koeln.de>
To:        "Christoph P. Kukulies" <kuku@gilberto.physik.rwth-aachen.de>
Cc:        freebsd-current@freefall.freebsd.org
Subject:   Re: ncr dead message 
Message-ID:  <199608081613.SAA03186@x14.mi.uni-koeln.de>
In-Reply-To: <199608061121.NAA09546@gilberto.physik.rwth-aachen.de>
References:  <199608061121.NAA09546@gilberto.physik.rwth-aachen.de>

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Christoph P. Kukulies writes:
 > I found this in my /var/log/messages: (2.2-current of Aug 1st)
 > 
 > Aug  2 10:29:13 isdn /kernel: ncr0:0: ERROR (80:4) (8-0-0) (8/13) @ (b30:c0000001).

This is most probably a transient problem:

dstat=0x80:	DMA FIFO empty (that's ok)
sist =0x04:	Unexpected Disconnect (but that's a problem ...)

The ATN line is asserted, and the last bus 
phase appears to have been a DATA OUT.

 > Aug  2 10:29:26 isdn /kernel: 	script cmd = 800c0006
 > Aug  2 10:29:26 isdn /kernel: 	reg:	 da 00 80 13 47 08 00 1f 01 08 80 00 80 00 0e 02.
 > Aug  2 10:29:26 isdn /kernel: ncr0: restart (ncr dead ?).

I'm not sure why this hung the system, but
it might have been due to a lost strobe ...

 > Aug  2 10:29:26 isdn /kernel: ncr0: restart (ncr dead ?).
 > Aug  2 10:29:26 isdn /kernel: swap_pager: I/O error - async pageout failed; blkno 9984, size 8192, error 5
 > Aug  2 10:29:26 isdn /kernel: swap_pager_finish: I/O error, clean of page 916000 failed
 > Aug  2 10:29:26 isdn /kernel: swap_pager_finish: I/O error, clean
of page 913000 failed

I'm not sure what the swap pager does in that 
case. Is it fatal, or will the operation just
be retried next time the page is found eligible
for page out ?

 > It was a single occurance and maybe a transient failure. Anyway, I'm
 > reporting it here just fyi.

Well, it doesn't look like a driver problem.

Regards, STefan



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