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Date:      Fri, 21 Jun 2002 21:10:04 +0400 (MSD)
From:      Dmitry Morozovsky <marck@rinet.ru>
To:        Soeren Schmidt <sos@freebsd.dk>
Cc:        stable@freebsd.org
Subject:   More comments about ATA tagging with 4-stable
Message-ID:  <20020621210356.F56241-100000@woozle.rinet.ru>

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Colleagues,

one of our machines does *not* work properly with ATA tags even after last
splx commit to ata-all.c. The only difference I've found with it is that
it has three IBM disks and one of them does not support tagging:

Jun 20 18:44:40 jubjub /kernel: ad0: 19574MB <IBM-DPTA-372050> [39770/16/63] at ata0-master tagged UDMA33
Jun 20 18:44:40 jubjub /kernel: ad2: 9641MB <IBM-DTTA-371010> [19590/16/63] at ata1-master UDMA33
Jun 20 18:44:40 jubjub /kernel: ad3: 58644MB <IBM-DTLA-307060> [119150/16/63] at ata1-slave tagged UDMA33

so, as you can see, there is tagged-capable disk at ata0 and two, one
capable and one non-capable at ata1.

Troubles I have look familiar:

Jun 20 18:44:40 jubjub /kernel: ad3: READ command timeout tag=0 serv=0 - resetting
Jun 20 18:44:40 jubjub /kernel: ad3: invalidating queued requests
Jun 20 18:44:40 jubjub /kernel: ata1: resetting devices .. ad3: invalidating queued requests
Jun 20 18:44:40 jubjub /kernel: done
Jun 20 18:44:40 jubjub /kernel: ad3: no request for tag=0
Jun 20 18:44:40 jubjub /kernel: ad3: invalidating queued requests
Jun 20 18:44:40 jubjub /kernel: ad3: READ command timeout tag=0 serv=0 - resetting

However, this machine locks up instead of just dropping to PIO (and cause
it's production machine, I had not much time for experiments)

I can provide more details if you are interested, Soeren.

Anyway, thank you again for you work at ata driver.

Sincerely,
D.Marck                                   [DM5020, DM268-RIPE, DM3-RIPN]
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*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
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