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    SubjectRe: [PATCH] zip drives
    On Wed, 15 Mar 2000, Manfred Spraul wrote:

    > From: "James Sutherland" <>
    > > > Gadi Oxman writes:
    > > >
    > > > > Another point to add is that some (newer?) ZIP drives have a jumper
    > > > > on them which enables some cheat mode for MSDOS which actually hides
    > > > > some sectors from the device driver.
    > Both WinNT and Windows 95 need the cheat mode: IIRC they don't analyze the
    > partition table if the device reports itself as ATAPI FLOPPY.

    Oh dear.
    #include <broken-code-rant.h>

    OTOH, why would/could a floppy contain a partition table?

    > > > > That is, block 0 on the drive
    > > > > actually moves along with the partition table, and perhaps also the
    > > > > reported capacity.
    > Fixed 32 blocks, they don't analyze the partition table.
    > > [...]
    > > Load first sector. Is it an MBR/partition table, or a boot sector?
    > > If the former, add an offset of 32 sectors to all subsequent accesses.
    > > This way, we get consistent behaviour from both types of drive.
    > > You then always mount /dev/sda (or whatever).
    > What if you have a partition table with != 32 sectors? Just try to mount an
    > hfs formatted disk, the lenght of the partition table depends on the version
    > of the formatter :-(

    Oh dear...
    #include <broken-code-rant.h>

    Fortunately, the 32 sector bit may not matter now - if we can implement
    the following...

    > But it possible to disable this mode with some special ATAPI commands, IIRC
    > my brother told me that he send them to a linux developer a few months ago.

    Provided we can do this *RELIABLY* (i.e. on ALL Zip drives), this could be
    the best solution. Simply ensure that we always see the entire disk, and
    so it will always be mounted as /dev/hda4 (assuming it is partitioned that


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