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    SubjectRe: 2.6.15-rc5-mm1
    Andrew Morton wrote:

    I just noticed (maybe too late) that this kernel has the "pata_via"
    driver and decided to try it. It works here, but has one drawback: it is
    slower than the old "via82cxxx" IDE driver.

    My configuration with the via82cxxx driver:

    /dev/hda = disk, QUANTUM FIREBALLlct20
    Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1

    /dev/hdb = SAMSUNG CD-ROM SC-148F
    Drive is old, supports only mdma2

    There are also /dev/hdc and /dev/hdd, irrelevant here.

    With the via82cxxx driver, I can get speed around 20 MB/s from /dev/hda.
    The pata_via driver downgrades this to 7 MB/s because it needlessly
    drops the disk to MWDMA2 mode.

    Alexander E. Patrakov
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      Last update: 2005-12-09 02:13    [W:0.021 / U:11.300 seconds]
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