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Date: Mon, 4 Nov 1996 13:20:10 -0500 (EST)
From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com>
Message-Id: <199611041820.NAA00642@lakes.water.net>
To: pvp@fareast.rosprint.ru, ponds!freebsd.org!questions
Subject: Re: problem with SCSI subsytem
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Sender: owner-questions@FreeBSD.ORG
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I just encountered a *very similar* problem using 2.1.5 and an aha2940
which I reported just a couple of days ago... (aha - the "bug time" theory
strikes again.)

Just to let you know what I've discovered so far.  I called adaptec
to get their input.  First, you should disable the "disconnection"
negotiation done by the adaptec controller.  Apparently, some SCSI
devices don't like that.  Second, you should disable any "synch"
(short for synchronous) negotiation done by the controller.  Third,
you should drop the transfer rates down lower, particularly for older
hardware.

Lastly, of course, be sure you have proper SCSI cables and termination
at the ends of the SCSI bus.

	- Dave Rivers -

> 
> This is a multi-part message in MIME format.
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> There is message log in the file "problem.txt"
> This happens once a day 
> It leads to some filesystem errors 
> 
> This is my environment:
> FreeBSD 2.1.5
> IWill P55TU motherboard with Adaptec 7880 onboard SCSI controller
> 
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> 
> Nov  1 02:43:47 fareast /kernel: ahc0: Issued Channel A Bus Reset #2. 2 SCBs a
> borted 
> Nov  1 02:43:47 fareast /kernel:  asserted ATN - device reset in message buffer 
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:47 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:47 fareast /kernel: , retries:3
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): timed out in message in phase, SCSISIGI == 0xe6
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:47 fareast /kernel: ahc_intr: seqint, intstat == 0xd1, scsisigi = 0xb6
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
> Nov  1 02:43:47 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:47 fareast /kernel: , retries:1
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:47 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:47 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:48 fareast /kernel: , retries:4
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xe6
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:48 fareast /kernel: ahc_intr: seqint, intstat == 0xd1, scsisigi = 0xb6
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
> Nov  1 02:43:48 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:48 fareast /kernel: , retries:2
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): timed out in message in phase, SCSISIGI == 0xb6
> Nov  1 02:43:48 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:48 fareast /kernel: , FAILURE
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): timed out in message in phase, SCSISIGI == 0xe6
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:48 fareast /kernel: ahc_intr: seqint, intstat == 0xd1, scsisigi = 0xb6
> Nov  1 02:43:48 fareast /kernel: sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
> Nov  1 02:43:49 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:49 fareast /kernel: , retries:3
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): timed out in message in phase, SCSISIGI == 0xe6
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:49 fareast /kernel: ahc_intr: seqint, intstat == 0xd1, scsisigi = 0xb6
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
> Nov  1 02:43:49 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:49 fareast /kernel: , retries:1
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): timed out in message in phase, SCSISIGI == 0xe6
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:49 fareast /kernel: ahc_intr: seqint, intstat == 0xd1, scsisigi = 0xb6
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
> Nov  1 02:43:49 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:49 fareast /kernel: , retries:4
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xe6
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:49 fareast /kernel: ahc_intr: seqint, intstat == 0xd1, scsisigi = 0xb6
> Nov  1 02:43:49 fareast /kernel: sd0(ahc0:0:0): timed out in dataout phase, SCSISIGI == 0x0
> Nov  1 02:43:50 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:50 fareast /kernel: , retries:2
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:50 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 2 SCBs aborted
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:50 fareast /kernel: , FAILURE
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): asserted ATN - device reset in message buffer
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): timed out in message out phase, SCSISIGI == 0xb6
> Nov  1 02:43:50 fareast /kernel: ahc0: Issued Channel A Bus Reset #1. 1 SCBs aborted
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0): UNIT ATTENTION asc:29,0
> Nov  1 02:43:50 fareast /kernel: sd0(ahc0:0:0):  Power on, reset, or bus device reset occurred
> Nov  1 02:43:50 fareast /kernel: , retries:3
> 
>