burncd- acd0: FAILURE - START_STOP timed out

From: Christian Gründemann (christian_at_gruendemann.com)
Date: 07/28/04

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    To: <freebsd-stable@freebsd.org>
Date: Wed, 28 Jul 2004 10:18:22 +0200

    Hello!

    I have some strange errors with burning a DVD.
    In the beginning of the burn-process, burncd stopps
    and writes the following output to /var/log/messages.

    Jul 27 23:21:36 master kernel: acd0: FAILURE - START_STOP timed out
    Jul 27 23:22:06 master kernel: acd0: TIMEOUT - READ_BIG retrying (2 retries
    left)
    Jul 27 23:22:36 master kernel: acd0: WARNING - READ_BIG interrupt was seen
    but timeout fired
    Jul 27 23:23:06 master kernel: acd0: WARNING - READ_BIG interrupt was seen
    but taskqueue stalled

    After the aborted burn-process, neither the system is accessible
    via ssh nor any other process do their normal job. (Even though
    some processes "seems" to work, e.g. ssh asks me about login/password
    but doesn't give me access to the machine.) Furthermore, it is not
    possible to manually eject the DVD by pressing the eject button
    or by using the "cdrontrol eject" command. Unfortenuately, a reboot helps.

    Due to the fact that the obove mentioned error occurs exactly
    once a week with the same DVD-media, I suppose that this
    media is the originator of the problem. But anyhow, shouldn't
    the system be in a stable mode, even if I use a bad media?

    And maybe someone can give me a hint what
    the kernel message means?

    Thanks for clearing that up!
    Christian

    uname -rps : FreeBSD 5.2.1-RELEASE-p6 i386

    burncd command: /usr/sbin/burncd -q -f /dev/acd0 -s max dvdrw image.iso
    2>&1 | tee -a ${LOGFILE}

    atacontrol info 1
    Master: acd0 <PLEXTOR DVDR PX-504A/1.01> ATA/ATAPI rev 0
    Slave: no device present

    dmesg | grep -A1 -B1 -i acd0
    IP Filter: v3.4.31 initialized. Default = block all, Logging = enabled
    acd0: CDRW <PLEXTOR DVDR PX-504A> at ata1-master PIO4
    em0: Link is up 1000 Mbps Full Duplex

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