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Date:      Mon, 24 Jan 2000 22:19:57 +0100
From:      Jeroen Ruigrok/Asmodai <asmodai@wxs.nl>
To:        "Justin T. Gibbs" <gibbs@narnia.plutotech.com>
Cc:        scsi@FreeBSD.org
Subject:   Re: Need some real good advice to track this problem down
Message-ID:  <20000124221957.A290@daemon.ninth-circle.org>
In-Reply-To: <200001242010.NAA22362@narnia.plutotech.com>; from gibbs@narnia.plutotech.com on Mon, Jan 24, 2000 at 01:10:22PM -0700
References:  <20000124160434.D691@daemon.ninth-circle.org> <200001242010.NAA22362@narnia.plutotech.com>

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-On [20000124 21:28], Justin T. Gibbs (gibbs@narnia.plutotech.com) wrote:
>In article <20000124160434.D691@daemon.ninth-circle.org> you wrote:
>>
>> 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.

Fixed the jumpers on da2, see below.

>> 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?

Well, the airflow is good, seems that the drives don't get cooled enough
in their current position.  I removed da3 from the chain, and moved da2
to the outer position and set it to term and term from drive.

Now lets see how this behaves.  I will be looking at something to cool
the drives better.  Any suggestions are of course welcome to improve
this.

I cannot at the moment place any HD at the end of the other chain since
those are 3.5" drives and the mount area is 5.25", so I need to get some
mount brackets before I can attempt this.

Another mistake on my part, it is   empty stub---cdrom----terminator,
not what I said earlier:  cdrom----empty stub----terminator.

Thanks,

-- 
Jeroen Ruigrok vd W/Asmodai         asmodai@[wxs.nl|bart.nl|freebsd.org]
Documentation nutter/B-rated Coder BSD: Technical excellence at its best  
The BSD Programmer's Documentation Project <http://home.wxs.nl/~asmodai>;
How the gods kill...


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