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    SubjectRe: [Linux-usb-users] Re: Problems accessing USB Mass Storage
    On Tue, 17 Sep 2002, Thomas Dodd wrote:

    | Rogier Wolff wrote:
    | > On Tue, Sep 17, 2002 at 10:13:13PM +0100, Mark C wrote:
    |
    | > When dd is told to skip a certain number of input blocks it doesn't
    | > seek past them, but reads them and then discards them. Thus if you're
    | > not supposed to read sectors 1-100 then this will not work.
    |
    | Fair enough. I, and the others though it did a seek.
    |
    | > Try the following program:
    | <snip>
    | > with the command:
    | >
    | > dd if=/dev/sda of=firstpart
    | >
    | > (Get the partition table)
    | >
    | > (seek 0x100000;dd of=secondpart) < /dev/sda
    | >
    | > Get everything beyond 1Mb. If this works, then we have to figure out
    | > how low we can make the "0x100000" number to get all of the data.
    | >
    | > Hypothesis: The partition table specifies that the data starts
    | > on sector 200, and they didn't implement sectors 1-199.....
    |
    | Where did the sector 200 come from?
    | Something in the dmesg output from before?
    | (I don't really grok SCSI or USB at that level :( )

    I think that's part of the hypothesis, but if we can read the
    first sector, it should be trivial to decode the partition table,
    if it's a typical DOS/Windows/PC-type partition table.

    If someone can read the first sector, I'll be glad to decode it;
    just send it.

    --
    ~Randy
    "Linux is not a research project. Never was, never will be."
    -- Linus, 2002-09-02

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