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Date:      Mon, 24 Jan 2000 13:10:22 -0700 (MST)
From:      "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
To:        Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
Cc:        scsi@FreeBSD.org
Subject:   Re: Need some real good advice to track this problem down
Message-ID:  <200001242010.NAA22362@narnia.plutotech.com>
In-Reply-To: <20000124160434.D691@daemon.ninth-circle.org>

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In article <20000124160434.D691@daemon.ninth-circle.org> you wrote:
>
> Then one empty connector and then followed by an _active_ terminator.
> (Which I bought on Kenneth's advice I think after he mentioned that
> cdrom drives sometimes suck with their termination.)

I would probably be better to spread your devices across the whole
bus then to have this dangling stub.  Can you put one of your
hard-drives on the end instead of using the external terminator?

> disk4 =
> da3 at ahc0 bus 0 target 4 lun 0
> da3: <SEAGATE ST32171W 0484> Fixed Direct Access SCSI-2 device 
> da3: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing
> Enabled
> da3: 2047MB (4194057 512 byte sectors: 255H 63S/T 261C)
> This drive has Term Enable, Term From Drive and Term To Bus set.

You should not set "TP to bus".  The controller is providing termination
power and only once source is required.

> Jan 24 15:08:13 daemon /kernel: SEQADDR == 0x112
> Jan 24 15:08:24 daemon /kernel: Unexpected busfree in Data-in phase
> Jan 24 15:08:25 daemon /kernel: SEQADDR == 0x113
> Jan 24 15:08:25 daemon /kernel: (da3:ahc0:0:4:0): Invalidating pack
> Jan 24 15:08:25 daemon /kernel: (da3:ahc0:0:4:0): Synchronize cache
> failed, status == 0x4a, scsi status == 0x0

It looks like da3 may be the culprit.  Even with a degraded bus,
it is rare that a device will fail a selection.  Are you sure
that this device is running cool enough?

--
Justin


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