Charles,

        I recently purchased a Seagate 9G SCSI LVD/ultra 2 wide)
Hard Drive (Baracuda) and Adaptec 2940 U2W controller.  I suspect
that the IBM 9G Hard drive may also be a Baracuda.  I ran into
unreliability problems that appear to represent an overrating of
speed for the hard disk read amplifiers.  The workaround that
I am using is a reduced bus speed.  I intend to contact Seagate
to see if they will help, though the problem was not discovered
within the 30d warranty period.

        To use the Adaptec Bios setup
        1. Turn on computer power.
        2. Type \C-a when indicated during power-up.
                (Be ready. The time window is ~2s.)
        3. Select SCSI configuration.
        4. Move to column logical unit 0 (or as appropriate).
        5. Select speed (default is 80.0 Mbytes/s).
        6. Reduce speed to 53.4 Mbytes/s.
        7. Exit (\E)
        8. Confirm save of settings.
        9. Exit (\E)
        10. Confirm exit of setup program.

        I have similarly tried different cables, termination, and
mount options without affecting behavior.

Please let me know what you find.

Bob


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