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copying an old Idris floppy image - Linux / Unix Administration

Linux SuSE 8.2 I have two old Idris OS floppies I want to make image copies of. I have tried everything from 'cat /dev/fd0 > file.name' to rawread to a bunch of old freeware DOS utilities (FDCOPY, etc.) Linux isn't even able to mount the Idris floppies. Anyway, if anyone has a clue or a pointer to where I can read up and get one, I'd be very grateful....

  1. #1

    Default copying an old Idris floppy image

    Linux SuSE 8.2

    I have two old Idris OS floppies I want to make image copies of. I
    have tried everything from 'cat /dev/fd0 > file.name' to rawread to a
    bunch of old freeware DOS utilities (FDCOPY, etc.)

    Linux isn't even able to mount the Idris floppies.

    Anyway, if anyone has a clue or a pointer to where I can read up and
    get one, I'd be very grateful.

    Vendor Guest

  2. #2

    Default Re: copying an old Idris floppy image

    Begin <verizon.net>
    On 2005-01-13, Vendor Neutral <invalid> wrote: 

    You usually do that with dd(1) (dd if=/dev/fd0 of=file.name), but do
    see the manual for options you might or might not need, like setting
    the blocksize. If the blocksize is wrong it will not copy anything.

     

    I don't know what those are, but if they're a) not formatted in a
    manner that linux undertands (think floppies for c64 or the various
    cp/m machines or even older mac 800k floppies (pc hardware can't
    physically read those at all)) or b) not laid out with a filesystem
    linux understands, then you won't be able to mount them.

    Note that altough the linux mount(8) contains some code that makes wild
    guesses about what kind of filesystem is on a floppy, it is by no means
    always correct. If you happen to know what filesystem is on them, use an
    explicit -t <fstype> option to mount(8) to avoid the guessing code.


    --
    j p d (at) d s b (dot) t u d e l f t (dot) n l .
    jpd Guest

  3. #3

    Default Re: copying an old Idris floppy image

    Vendor Neutral <invalid> writes: 

    If they are old they may not be "double density" (1.44mb) - they may
    instead be "single density" (720k).

    You also have the double sided/single sided issue to worry about.

    try "man fd" - there will be a giant list of floppy device names, the
    density and the sidedness are determined by the device name.

    fd0 defaults to double sided double density. You'll have to find the right
    device name to make the copy with.

    The nice thing about the lower density floppies is that they may still
    contain mostly good data. My apple-II floppies are still readable after
    all these years.

    Later

    Mark Hittinger
    net
    Mark Guest

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