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    SubjectRe: Data corruption using 2940U
    Carsten Gross wrote:
    >
    > Hello!
    >
    > Perhaps this question is not really kernel related, but it's a lowlevel
    > problem and it _could_ be a serious kernel problem.
    >
    > I've some problems with data corruption on my SCSI discs connected to an
    > Adaptec 2940U. Mainboard is a dual Pentium Tyan Tomcat II (HX chipset,
    > 2*P100, 64 MB RAM, Kernel compiles without problems) using SMP Kernel
    > 2.1.111.
    >
    > It happens during copying from a MO drive 'Fujitsu' Model: M2512A (216 MB)
    > to a Micropolis SCSI harddrive Model: 4343NS using the Adaptec driver
    > Version 5.1.0pre4/3.2.4. Ultra support for the Micropolis is enabled, parity
    > checking on the pci_bus using the LILO commandline option
    > "aic7xxx=pci_parity" is enabled. SCSI parity checking is also enabled in the
    > BIOS setup. It's not only one or 2 bits, but a whole disc block of corrupted
    > data.

    [ snipped ]

    Do you have tagged queueing enabled on the Micropolis drive? If so, disable
    it because this sounds like one of those cases of broken tagged queueing
    implementations causing silent corruption.
    --

    Doug Ledford <dledford@dialnet.net>
    Opinions expressed are my own, but
    they should be everybody's.

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