Re: WRITE command timeout

From: Lee Cremeans (lee_at_lcremeans.homeip.net)
Date: 12/22/03

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    Date: Sun, 21 Dec 2003 23:25:23 -0500
To: "Oivind H. Danielsen" <oivind.danielsen@kopek.net>

    Oivind H. Danielsen wrote:

    > Hello.
    >
    > We have been running FreeBSD 4.6-5.1 systems for 1.5 years and are being
    > plagued by these:
    >
    > Dec 18 15:15:39 <> /kernel: ad0: WRITE command timeout tag=0 serv=0 -
    > resetting
    > Dec 19 15:03:23 <> /kernel: ad0: READ command timeout tag=0 serv=0 -
    > resetting
    >
    >
    > In our rack we have 34 identical drives (IBM IC35L080AVVA07).
    >
    > 24 drives on Windows 2000 : no problems.
    > 4 drives on Linux 2.4.x : no problems.
    >
    > 2 drives on RELENG_4_8
    > (VIA 82C686, VIA C3) : no problems
    >
    > 4 drives on RELENG_4_8
    > (nVIDIA nForce, XP 2000+) : r/w timeouts, fs corruption.
    >
    > (1 drive/system, 6 FreeBSD boxes)
    >
    > The good systems have been running the 1.5 years without a hitch. The
    > four identical RELENG_4_8 systems have all had corrupted filesystems (at
    > least once every two months).
    >
    >
    > We have tried the following:
    >
    > - Changed ATA100 cables (3 diff. types, all 80-wire)
    > - Disabled DMA (use PIO4) (hw.ata.ata_dma="0" in loader.conf)
    > - Disabled DMA in BIOS setup
    > - Changed motherboard (MSI MS6734, VIA KM400, vt8235 ATA)
    > - Changed power supply (added 100W)
    > - RELENG_5_1.
    >
    > None of these changes has helped. The only change seen when disabling
    > DMA is additional messages: "timeout waiting for DRQ - resetting".

    It sounds like that particular drive is on the way out. Have you tried
    running IBM/HGST's "Drive Fitness Tools" disk on it? (It's a DOS
    program, but it comes on a self-booting diskette image that you can also
    burn to a bootable CD if you like.) That program should be able to
    detect any problems, and let you know if you need to send the drive back.

    -lee
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