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    SubjectRe: Cylinder limits jumper for drives over 32GB
    > 0000 0000 0000 0000 0000 0000 0000 23a5


    This afternoon I have played a bit with READ_NATIVE_MAX_ADDRESS
    and SET_MAX_ADDRESS, and find for my 36.5 GB Maxtor the following:

    [In CHS mode I get #cylinders mod 65536, in LBA mode the correct answer.]

    (ii) SET_MAX_ADDRESS works whenever I want to set the max address
    to anything at least 255 sectors from the end. So, as soon as I
    have used SET_MAX_ADDRESS, 255 sectors or 130kB is gone.
    A reboot does not suffice to get this back, but after a power cycle
    the disk has full capacity again.

    (I wonder whether this is a bug. The way I read the ATA-5 spec
    it should be possible to do SET_MAX_ADDRESS to the address
    gotten back from READ_NATIVE_MAX_ADDRESS.)

    A side effect of SET_MAX_ADDRESS is that the current geometry
    is reset to 16383/16/63.


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