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    SubjectRe: [PATCH 2/2] MEMSTICK: Add driver for Ricoh R5C592 Card reader.
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    Hi,

    I have few more questions about memsticks.

    First of all, I need an explanation of overwrite flag.
    You already explained it to me once, but I still not sure about few
    things.



    #define MEMSTICK_OVERWRITE_UDST 0x10
    This one I understand, thinking about xD again, I think it is very
    handy.

    My idea (from xD of course) is that copyonwrite is done this way:

    1. read old sector
    2. allocate new sector
    2. write what was just read to new sector.
    3. erase old sector.

    Could you explain when I need to set and reset the
    MEMSTICK_OVERWRITE_UDST?


    #define MEMSTICK_OVERWRITE_PGST1 0x20
    #define MEMSTICK_OVERWRITE_PGST0 0x40
    I suppose these indicate that page(sector) contains incorrect data, just
    like in xD there is page status?
    Again, better explanation is welcome.
    Also, should I touch that flag when I update sector?



    #define MEMSTICK_OVERWRITE_BKST 0x80
    This marks bad blocks?



    Another question is about write of oob data.
    When I write it, overwrite flag is updated, or I need to use
    MEMSTICK_CP_OVERWRITE to update it?
    I think former is true.

    When I write a sector, I just write 0 to management flag, right?


    And last question,
    If I use MEMSTICK_CP_BLOCK, can I start reading a block from non-zero
    page offset?


    And surely last question, what is 'MS_CMD_BLOCK_END'


    Thanks again for all help so far,

    Best regards,
    Maxim Levitsky



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