Intermittent Card Reader Problem

Discussion in 'Digital Cameras' started by jim evans, Sep 10, 2006.

  1. jim evans

    jim evans Guest

    I posted this problem a while back and no one knew the answer, so I
    thought I'd try again.

    About one time in 5 when I insert a memory card into my card reader
    the computer does not recognize/see it. When this happens I have to
    disconnect the USB cable and reconnect it (sometimes twice), and
    occasionally I have to reboot. The connector had not been touched or
    moved in any way between times it works and times it doesn't. This
    condition has persisted through two operating systems (W98, XP), two
    computers, two card readers, two versions of USB and two
    cameras/memory card types (SmartMedia, Compact Flash) .

    Anyone know what causes this or how to correct it?

    -- jim
    jim evans, Sep 10, 2006
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  2. jim evans

    Bob Williams Guest

    Win Xp (maybe others) has a little icon in the task tray that you are
    supposed to click to safely remove USB devices (e.g., a card reader). If
    you click the icon it deactivates the USB device.
    If you reinsert the same or another card, it is not recognized.
    You must reboot or disconnect and reconnect the device.
    Did you click the icon?
    Bob Williams
    Bob Williams, Sep 10, 2006
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  3. Since this "problem" occurs over 2 different computers, 2 OS's,
    etc., etc., it most likely not hardware or software related. I'd
    guess, the problem lies with you and is a procedural one, that is, how
    you're plugging and unplugging the cards, what you do when they are
    plugged in, what apps that are still running and have a "lock" on the card
    when you do unplug, etc., etc.

    So, check your procedures to see if they comply with the operating

    Stefan Patric, Sep 10, 2006
  4. jim evans

    jim evans Guest


    -- jim
    jim evans, Sep 11, 2006
  5. jim evans

    jim evans Guest

    There are slots the card fit snugly in and one simply pushes the card
    until it seats. The method appears to be the same for all card
    readers I've seen. I can't see how one can insert cards in different
    I use batch files to copy the image files from the card reader to my
    hard drive and they work exactly the same way every time. But, after
    inserting the card if one looks at the "drive" they're in, nothing is
    I run no apps related to the card reader except the batch file which
    completes and unloads.
    Don't know what this might be.
    Where would I find the procedures for the XP Pro related to card

    -- jim
    jim evans, Sep 11, 2006
  6. jim evans

    jim evans Guest

    And that fixed the problem?

    -- jim
    jim evans, Sep 11, 2006
  7. jim evans

    jim evans Guest

    That would be a third cable since two card readers that have exhibited
    this behavior and they had different cables. Each came with it's own
    cable which I used with it.

    -- jim
    jim evans, Sep 11, 2006
  8. jim evans

    jim evans Guest

    On thing that becoming clear from these replies -- this isn't a common
    problem. That's what makes it so strange I've had it under all these
    conditions. ????

    -- jim
    jim evans, Sep 11, 2006
  9. I knew I should have qualified that statement. What I meant was do you
    plug the card into the reader, and then plug the whole assembly into the
    computer? Or do you plug in the reader, then plug in the cards? And with
    removing the cards: Do you just remove the card and leave the reader
    plugged in, or do you remove both at the same time, or do you leave the
    reader plugged in all the time and plug in and remove the cards only?
    That's what I meant.

    You should plug in the reader first, then plug in and unplug the cards,
    and when all done, if you desire, unplug the reader. I leave mine plugged
    in all the time.
    You use a batch files? Commandline, right? Or do you use the "RUN"
    command from within the GUI? Have you used this same script for both your
    systems, and both OSes, and both readers, etc? This script may be the
    commonality among all the variables. Try not using it (them) for a while,
    and use a file manager instead to see if your problem persists.

    Another thing: What utilities does your batch file call when it copies
    off the card to the hard drive? Does the script also erase or delete the
    files on the card? These called commands may be causing the problem. Or
    there could be a conflict between those commands and the OS "unmounting"
    or "unlocking" the card when everything is done.
    The batch file may unload, but the commands it calls could be the culprits.
    Neither do I. That's left as an exercise for you to do. You're closer to
    the problem.
    RTFM and Help files. That's where I learned everything I know about
    computers. That and making lots of mistakes. ;-)

    Good luck...

    Stefan Patric, Sep 14, 2006
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