We are currently using Promise Ultra133 TX2 (PDC20269 chip; pata_pdc2027x
driver, kernel version 2.6.15) to test and access PATA drives. If my
understanding is correct, during boot, a drive is queryied to determine it's
maximum access speed and the driver sets the access speed to be no higher
than the drive can handle. This is not speed testing the drive, but just
the drive firmware reporting it's maximum designed transfer rate. Due to
design constraints of the cabling to the drives, we need to force the access
speed lower than what the Drive reponds. Is there a mechanism to tell the
driver/LibATA to set the access speed to go no higher than a value I supply?
This can be a static setting that is set at boot, as it does not need to
be a dynamic setting.
Best wishes,
John Treubig
VT Miltope Corporation
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