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Date:      Mon, 11 Nov 2002 01:49:18 -0800
From:      David Schultz <dschultz@uclink.Berkeley.EDU>
To:        "Justin T. Gibbs" <gibbs@scsiguy.com>
Cc:        ANYBODY <somebody@kashmir.etowns.net>, freebsd-current@FreeBSD.ORG
Subject:   Re: adaptec scsi - seagate da -- current
Message-ID:  <20021111094918.GA5702@HAL9000.homeunix.com>
In-Reply-To: <20021110081757.GA961@HAL9000.homeunix.com>
References:  <20021030095416.GA1840@hurd1.kashmir.etowns.net> <376290000.1035997229@aslan.btc.adaptec.com> <20021110081757.GA961@HAL9000.homeunix.com>

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Thus spake David Schultz <dschultz@uclink.Berkeley.EDU>:
> I'm running into the same problems on a very light I/O load
> (running /usr/bin/less on certain files triggers it).  There's
> also a timeout every time at bootup.  I have included my dmesg
> below.
[...]

Here's some additional information:

# camcontrol inquiry da0
pass0: <QUANTUM XP34550S LXY1> Fixed Direct Access SCSI-2 device 
pass0: Serial Number PCB=2011303002  ; HDA=184715611932
pass0: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing Enabled
# camcontrol tags da0 -v
(pass0:ahc0:0:0:0): dev_openings  24
(pass0:ahc0:0:0:0): dev_active    0
(pass0:ahc0:0:0:0): devq_openings 24
(pass0:ahc0:0:0:0): devq_queued   0
(pass0:ahc0:0:0:0): held          0
(pass0:ahc0:0:0:0): mintags       24
(pass0:ahc0:0:0:0): maxtags       32

# camcontrol inquiry da1
pass1: <QUANTUM VIKING 4.5 NSE 8808> Fixed Direct Access SCSI-2 device 
pass1: Serial Number 174716034271
pass1: 20.000MB/s transfers (20.000MHz, offset 15), Tagged Queueing Enabled
# camcontrol tags da1 -v
(pass1:ahc0:0:1:0): dev_openings  253
(pass1:ahc0:0:1:0): dev_active    0
(pass1:ahc0:0:1:0): devq_openings 253
(pass1:ahc0:0:1:0): devq_queued   0
(pass1:ahc0:0:1:0): held          0
(pass1:ahc0:0:1:0): mintags       2
(pass1:ahc0:0:1:0): maxtags       255

It seems like da0 is the problem device.  Just after it times out
now and then, camcontrol shows things like:

# camcontrol tags da0 -v
(pass0:ahc0:0:0:0): dev_openings  22
(pass0:ahc0:0:0:0): dev_active    2
(pass0:ahc0:0:0:0): devq_openings 22
(pass0:ahc0:0:0:0): devq_queued   0
(pass0:ahc0:0:0:0): held          0
(pass0:ahc0:0:0:0): mintags       24
(pass0:ahc0:0:0:0): maxtags       32

# camcontrol tags da0 -v
(pass0:ahc0:0:0:0): dev_openings  16
(pass0:ahc0:0:0:0): dev_active    8
(pass0:ahc0:0:0:0): devq_openings 16
(pass0:ahc0:0:0:0): devq_queued   0
(pass0:ahc0:0:0:0): held          0
(pass0:ahc0:0:0:0): mintags       24
(pass0:ahc0:0:0:0): maxtags       32

It seems like da1 is fine, but then again I use that drive less
heavily.

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