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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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