Compact Flash Data Corruption Problems

Discussion in 'Digital Cameras' started by Jake, Jun 4, 2005.

  1. Jake

    Jake Guest

    I have a Canon Powershot A95, and a Kingston Elite Pro 1 gig Compact
    Flash card. I used them both for a couple weeks with no problems, and
    then when I bought a card reader things started getting weird. I'd
    shoot some images and I could see them on the LCD in playback mode, but
    when I would stick them into my card reader, some of the most recently
    shot images would not be there. I'd put them BACK in the camera, and
    they were not viewable on the camera either. This is the most recent

    1) I shot one image, and copied it to my computer using my card reader.
    2) I took the card reader out of the computer, and put it back in the
    3) I shot 3 more images.
    4) I put the card back in the computer, and the 3 most recently shot
    photos were not there. The only one left was that first one.

    I went into the format menu of the camera, and it said something like
    7.5 megabytes were used, which is far too much for one image, so I found
    some data recovery software and was able to recover those 3 images.
    Does anyone know if there's something different I should be doing to
    avoid this, or do you think it's some sort of a hardware problem? I've
    heard from some places that you should format the card every time you
    put it back in the camera. I just want to know what I should be doing
    so that when I'm taking photos I actually care about, I don't lose
    anything. Thanks.
    Jake, Jun 4, 2005
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  2. Jake

    Jake Guest

    Something I forgot to add, was that after shooting those 3 images, they
    were definitely viewable in the camera. I went back and forth between
    them and zoomed in and out and stuff. It was only once I put them in
    the CF reader that I ran into problems.
    Jake, Jun 4, 2005
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  3. Jake

    Jake Guest

    I like the reader because it doesn't waste the camera batteries when
    downloading images. The card reader is also much faster, and I hate
    having to mess with Canon's special software. But like you said, it
    definitely does work and I don't recall any corruption problems before I
    started using the card reader, so who knows. Maybe I'll go back to that.
    Jake, Jun 4, 2005
  4. Jake

    Dirty Harry Guest

    Maybe he would prefer to use a card reader cause its 10000x faster,
    obviously something isn't working right and the solution of "oh just use
    your camera as a card reader," is pretty lame.
    Dirty Harry, Jun 4, 2005
  5. Jake

    Dirty Harry Guest

    Sounds like it could be a card reader problem. Did you remember to install
    the software BEFORE you attached the card reader? Maybe the reader is a
    Dirty Harry, Jun 4, 2005
  6. Jake

    Neil Ellwood Guest

    You don't have to use Canons software. I transfer straight to my comp.
    using GTkam2 and there is no messing about as I only have to select
    the destination. I use Mandrive LE2005 but many other distros also
    have it.
    Neil Ellwood, Jun 5, 2005
  7. Jake

    Jake Guest

    Perhaps it IS a lemon. I got it for CHEAP off of
    It was one of their daily specials and was only $8.99. So it seems like
    you all think that this is probably a problem with the reader itself?
    It didn't actually come with any software of its own, it just uses the
    Windows 2000 Mass Storage device drivers. I'd use that gtkam2 thing,
    but I don't use Linux, so I can see how that would present a problem.
    Also, the card reader is SO much faster than from the camera itself. I
    just wish I knew what it was that was going wrong before I take some
    pictures I really need. I mean, I don't even know if it's the card
    reader. It could be the camera, or the card itself. Thanks for all of
    the replies. If anyone has any other ideas, please let me know. Thanks.
    Jake, Jun 5, 2005
  8. Jake

    Big Bill Guest


    I bet a quarter the card reader is bad.
    Big Bill, Jun 5, 2005
  9. Jake

    Jake Guest

    The missing files doesn't happen every single time I use the card reader
    which is why I'm so confused. I can download images fine by hooking it
    up directly to the camera, but it's much slower that way, and it drains
    the batteries. I tend to agree it probably has something to do with the
    reader because I shot well over a hundred images before I ever got a
    card reader. The other thing is, some web sites had suggested that data
    corruption could happen if you removed cards from devices that had not
    been properly "stopped" with the little tray icon in Windows. Has
    anybody heard about this? Maybe it is just the card reader. I hope
    that's all it is, because if this is the case, I can just format the
    card in the camera after I download images each time.
    Jake, Jun 5, 2005
  10. kcinvader wrote:
    Do you have a reference for that?
    There are two statements there I would disagree with!

    David J Taylor, Jun 12, 2005
  11. Jake

    Ron Hunter Guest

    Bad advice! Check the card in another camera, to determine if the card,
    or camera, is the cause. I am assuming you know better than to turn off
    the camera before all data has had time to write to the card...
    Formatting a flash card outside the camera leads to problems with
    special formatting, and file structure needs of some cameras, and is to
    be avoided if possible. There is also no need to do a format at all if
    all pictures are routinely deleted after downloading.
    My guess is that you have a bad card.
    Ron Hunter, Jun 12, 2005
  12. Ron Hunter wrote:
    Whilst I agree that there is no need to reformat the card if the images
    have been deleted, my own preference (and what I would recommend to
    others) is not to delete individual images, or even images in bulk, but to
    simply reformat the card before use.

    [Background 1: formatting uses fewer writes to the card than deleting,
    especially in bulk, so prolongs the life of the card.]

    [Background 2: the way I work is to take a number of cards on a trip,
    enough for the whole trip, and fill the cards more or less completely. I
    don't always have a portable storage device with me. Therefore I would
    format cards only after copying all images to my computer and getting two
    verified backups onto CD/DVD.]

    David J Taylor, Jun 12, 2005
  13. Jake

    ASAAR Guest

    Or it could be neither. Did you ever format the card prior to
    using it? If not, the card's true format (or lack of) may be
    confusing the computer slightly, but enough to cause problems. If
    you haven't done so yet, I'd try formatting the card in the camera
    (do NOT do it in the card reader using the computer) and then see if
    the problems disappear. If they don't, it makes it more likely that
    there's some problem with the card reader. Then you have so more
    things you could try, such as seeing if the card can be read by
    someone else's computer with a known good card reader, or by
    borrowing a good card reader and seeing if it works reliably on your
    ASAAR, Jun 12, 2005
  14. Jake

    Ron Hunter Guest

    Different people, different usage patterns.
    I use my camera for miscellaneous purposes, which usually means I take a
    few pictures every day, and sometimes take a lot of pictures over one,
    or several days (such as vacations). Right now the card in my camera
    has about 60 pictures on it, including pictures of the hibiscus plants
    on my porch, my cat, the neighbor's daughter, the neighbor's
    fence-building project, my recent trip to Shreveport, and more hibiscus
    pictures. All but 4 have been moved to the computer. When I move all
    those pictures into Photoshop Elements 3.0, and have backed them up to
    the other THREE hard drives on my other computers, then I will delete
    the files from the card.

    Vacations, such as my Alaskan cruise last year, fill several cards, and
    I leave the pictures on the cards until the multiple backup process is
    completed, just in case. Then I will reformat the full cards.

    I have little expectation of 'wearing out' a card.
    Ron Hunter, Jun 12, 2005
  15. Ron Hunter wrote:
    Yes, wearing out a card is most unlikely! Interesting to hear how you
    work - I do much the same in taking pictures, but I leave the odds and
    ends to accumulate over time until the next major trip.

    David J Taylor, Jun 12, 2005
  16. OK on the mistaken Web site, Kevin.

    I recommend the SanDisk Ultra II - it does have the higher speed which may
    help when reading the card in your card-reader, or may help in your next
    camera. I would not expect to pay more than 15% extra for the higher

    David J Taylor, Jun 14, 2005
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