Bug in Dynax 7D firmware

Discussion in 'Digital SLR' started by Stéphane Guillard, Jul 1, 2005.

  1. Hi,

    I've finally found something bad with my 7D :)

    I have set the picture storage mode to large jpegs, one file folder per day.

    Last week end I was shooting a couple of pictures, when the memory card got
    full (a 256 MB compactflash).

    I deleted a few pictures from previous days.

    Then I could shoot another couple of pictures, but at one point when I
    wanted to review the pictures, the camera displayed something in the lines
    of "memory card unusable - format ?"

    I shut the camera off, then on, I can review the pictures from all days but
    the last.

    Repeat : same.

    When i hooked the camera to the PC (USB connection, simple "remote drive"
    mode) and started browsing the directories, the last folder has a recursive
    link to the top folder.

    This can be seen here : http://s.guillard.free.fr/d7d-fw-bug.jpg

    I'm using the latest public firmware release (only updated once since I
    bought the camera late 2004.

    Kind regards,
     
    Stéphane Guillard, Jul 1, 2005
    #1
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  2. Stéphane Guillard

    Jer Guest


    Ouch! Firmware release 1.10 is the latest on this side of the pond.
    Also, since I've had mine, I've "diagnosed" all three 1Gb cards here by
    shooting enough crap shots to fill each card to the point of the "card
    full" complaint - no problems whatsoever - and this tested the batteries
    too. I wonder what may happen with your card under the same
    circumstances after you've reformatted it. Instead of a firmware issue,
    it may just be a bad area on the card which doesn't manifest itself
    until it's almost full. A second card may help you with this same test.
     
    Jer, Jul 1, 2005
    #2
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  3. Stéphane Guillard

    Jer Guest

    [....]


    Oh, forget to mention, I'm using Lexar 1GB 80x WA cards for what it's worth.
     
    Jer, Jul 1, 2005
    #3
  4. Stéphane Guillard

    Darrell Guest

    Hmmm, I see many folders do you ever format the card in camera or are you
    just going to file it with empty folders? Format the card and see if the
    error still exists. BTW why such a small card, in RAW mode that would hold
    around 20 images or less.
     
    Darrell, Jul 2, 2005
    #4
  5. Hi,
    This is the one I use.
    You not having problem is not a proof of bug absence, but me having problem
    is a proof of bug presence...

    Furthermore, it is not when card went full that the folder in folder
    recursive nesting problem appeared, it is after I deleted a couple of shots
    here and there to "make room" for extra shots, that the camera started
    acting weird.

    This is obviously a filesystem code bug (I know, I've coded a FAT file
    system myself for my Apple 2 [http://s.guillard.free.fr], and it took me
    long before it was 100% safe :)
    Of course, as soon as the CF was reformatted, everything was back again...
    Until bug shows again :)
    A second card is handy, no doubt. But I still put it on a firmware bug
    (there is no reason there would be none).

    Regards,
     
    Stéphane Guillard, Jul 4, 2005
    #5
  6. Hi,
    Then buy another pair of glasses :) there is exactly 4 daily folders in the
    root directory "DCIM"). The problem is that the camera firmware somehow
    fsck-ed the filesystem structures when deleting pictures in the full CF,
    which ended up with the last folder having a link to the root dir (creating
    an endless recursive chain, which just broke the firmware's ability to use
    the CF).
    No, so far I did that only once, and saw no reason to do it. After I
    download pictures from the CF to the computer (using the USB cable, thus the
    camera's firmware is the only actor manipulating the filesystem's
    structures), I delete the daily folders. Until this incident happened,
    everything had been fine.
    Of course, the filesystem structure error went away after reformatting the
    CF. But the fact that it happened, without ever pulling the CF out of the
    camera, is a tangible proof of firmware bug.
    I don't see the relevance of this comment. I shoot in xfine JPG, and I'm
    jsut happy with my CF? which holds typically 2 x the amount of pictures I
    was used to put on a 24 shot film.

    Kind regards,
     
    Stéphane Guillard, Jul 4, 2005
    #6
  7. Stéphane Guillard

    Jer Guest

    I wasn't intending to dispell a bug report, only to relate my own
    flawless, albeit limited, experience with my own cards.
    Yup, you did say that (thanks for the reminder).

    I wouldn't be so quick to condemn the firmware - we don't appear to have
    enough info to do that - yet. Firmware bugs are expected to be
    repeatable under predictive circumstances, and often by more than just
    one user. Your issue appears be a little green for that, but you also
    may only be the first of many from 7D users still lining up at the
    internet door.

    I don't have any 256Mb CF cards to play with, but I haven't been to the
    store yet either. Creating the daily folders should be easy by humping
    the calendar, though I'm curious if the aggregate file count is
    relevant, were your file deletions consecutive (or not), at the end of
    the FAT chain (or not).
     
    Jer, Jul 4, 2005
    #7
  8. Stéphane Guillard

    mcl Guest

    Post your problem here.
    http://forums.dpreview.com/forums/forum.asp?forum=1035
    Much more active newsgroup than this one.

    I wasn't intending to dispell a bug report, only to relate my own
    flawless, albeit limited, experience with my own cards.
    Yup, you did say that (thanks for the reminder).

    I wouldn't be so quick to condemn the firmware - we don't appear to have
    enough info to do that - yet. Firmware bugs are expected to be
    repeatable under predictive circumstances, and often by more than just
    one user. Your issue appears be a little green for that, but you also
    may only be the first of many from 7D users still lining up at the
    internet door.

    I don't have any 256Mb CF cards to play with, but I haven't been to the
    store yet either. Creating the daily folders should be easy by humping
    the calendar, though I'm curious if the aggregate file count is
    relevant, were your file deletions consecutive (or not), at the end of
    the FAT chain (or not).
     
    mcl, Aug 4, 2005
    #8
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