Single file corrupted on CF card; Has this ever happened t..

Archived from groups: rec.photo.digital (More info?)

I won't name the camera model.

I have a major-brand GB CF flash card that I've used to take a few
thousand shots. I ALWAYS format the card in the camera after it's been
in the PC.

Yesterday I shot some forgettable sunset shots, as an experiment. I
stepped thru them right in the CF card with Irfanview. It hand up on
_one_ of the images and an "unrecognizable file format" message pops
up, on this file.

I copied all the files to my hard drive, with no problems. Stepping
thru them with irfanview gives the same error on the same file, so it
seems to be restricted to the structure of the RAW file.

In the computer I did a CHKDSK /F and it found no errors.

Has anything like this happened to anyone else ?

--

a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore.

Archived from groups: rec.photo.digital (More info?)

In article <cr45uq$vob$1@helcaraxe.dcc.uchile.cl>,
chidalgo <chidalgo@bla.bla.bla> wrote:
>Al Dykes wrote:
>
>> I have a major-brand GB CF flash card that I've used to take a few
>> thousand shots. I ALWAYS format the card in the camera after it's been
>> in the PC.
>>
>> Yesterday I shot some forgettable sunset shots, as an experiment. I
>> stepped thru them right in the CF card with Irfanview. It hand up on
>> _one_ of the images and an "unrecognizable file format" message pops
>> up, on this file.
>>
>> I copied all the files to my hard drive, with no problems. Stepping
>> thru them with irfanview gives the same error on the same file, so it
>> seems to be restricted to the structure of the RAW file.
>
> Did you tried another tool to open the file?
>
> Did you (by accident) poweroff the camera while writing data on the
>card? Or maybe the power went off (dry battery?)?
>
>
>> In the computer I did a CHKDSK /F and it found no errors.
>
> Not the best tool to analize memory cards. If i found the tool that i
>used once, i will post in here.
>
>
>--
>chidalgo


Nope. It was one short shooting session and I never powered the camera
off. The battry charge is fine.

Good call, but not an answer.

--

a d y k e s @ p a n i x . c o m

Don't blame me. I voted for Gore.

Archived from groups: rec.photo.digital (More info?)

Al Dykes wrote:
> I won't name the camera model.
>
> I have a major-brand GB CF flash card that I've used to take a few
> thousand shots. I ALWAYS format the card in the camera after it's been
> in the PC.
>
> Yesterday I shot some forgettable sunset shots, as an experiment. I
> stepped thru them right in the CF card with Irfanview. It hand up on
> _one_ of the images and an "unrecognizable file format" message pops
> up, on this file.
>
> I copied all the files to my hard drive, with no problems. Stepping
> thru them with irfanview gives the same error on the same file, so it
> seems to be restricted to the structure of the RAW file.
>
> In the computer I did a CHKDSK /F and it found no errors.
>
> Has anything like this happened to anyone else ?
>
Could it be a movie file that you don't have a codec for? Or possibly a
file used by the unnamed model camera?

Archived from groups: rec.photo.digital (More info?)

Formatting in the camera isn't going to check the card. For that you would
need to do some sort of surface scan.
How do you suppose recovery software can recover from a formatted card if
the data portion had been overwitten?.
Dave Cohen

"ZONED!" <no_email@please_post.net> wrote in message
news:41d5ae2e.9920955@Netnews.Comcast.net...
> On 31 Dec 2004 12:26:10 -0500, adykes@panix.com (Al Dykes) wrote:
>
>>I won't name the camera model.
>>
>>I have a major-brand GB CF flash card that I've used to take a few
>>thousand shots. I ALWAYS format the card in the camera after it's been
>>in the PC.
>>
>>Yesterday I shot some forgettable sunset shots, as an experiment. I
>>stepped thru them right in the CF card with Irfanview. It hand up on
>>_one_ of the images and an "unrecognizable file format" message pops
>>up, on this file.
>>
>>I copied all the files to my hard drive, with no problems. Stepping
>>thru them with irfanview gives the same error on the same file, so it
>>seems to be restricted to the structure of the RAW file.
>>
>>In the computer I did a CHKDSK /F and it found no errors.
>>
>>Has anything like this happened to anyone else ?
>>
>>--
>>
>>a d y k e s @ p a n i x . c o m
>>
>>Don't blame me. I voted for Gore.
> Perhaps a bad sector on the card? Try formatting and see if any errors
> pop up. If you have a reader I think you may have more options as far
> as determining bad sectors. May I ask why you avoid naming the camera?

Archived from groups: rec.photo.digital (More info?)

On 31 Dec 2004 18:21:02 -0500, adykes@panix.com (Al Dykes) wrote:

>In article <1104534291.77faa73ef42b225293b77182faeb0468@teranews>,
>Dave Cohen <dave@example.net> wrote:
>>Formatting in the camera isn't going to check the card. For that you would
>>need to do some sort of surface scan.
>>How do you suppose recovery software can recover from a formatted card if
>>the data portion had been overwitten?.
>>Dave Cohen
>
>
>To asnwer several posts;
>
>I did a full format (FAT32) in a PC a couple times. No errors
>reported.
>
>
>This CF card has only been used in this camera, or the PC,.
>
>It was formatted in the camera immediatly before I took the pictures,
>
>This is not a file system problem, it's a file with a type of JPG that isn't
>really a correct JPG.
>
>Still a mystery.
>
>
>--
>
>a d y k e s @ p a n i x . c o m
>
>Don't blame me. I voted for Gore.

Gremlins!

Archived from groups: rec.photo.digital (More info?)

On Sat, 01 Jan 2005 02:41:41 GMT
In message <41d60dd8.34411020@Netnews.Comcast.net>
no_email@please_post.net (ZONED!) wrote:

> > ...
> > Still a mystery.
>
> Gremlins!

I haven't had a single corrupt file until I
got a 20D (which locks up once every 200-500
shots for no apparent reason). The single
corrupt file was a fluke, and probably due
to the problem in the camera.

FWIW... I am becoming convinced that the lock
is caused by the dIgIc iI as implemented in the
20D does not use dual processors like the 1D(s).

(I had a 100% knack for sensing these things when
I was programming assembler full time. CANON:
Look for a subtle deadlock in the areas where
the 20D is doing in software what the 1D(s)
is doing with multiple processors.)

Jeff