Archived from groups: alt.comp.periphs.dcameras (
More info?)
On Tue, 11 May 2004 12:48:05 -0400, "David W. Poole, Jr." wrote:
>On Mon, 10 May 2004 19:57:45 +0200, Rolf Egil Sølvik
> was understood to have stated the following:
>
>>As far as the "fresh format" goes, I only meant to indicate that if
>>you take 20 pics and then delete i.e. number 3, 5, 11 and 15
>>possibly the 21st and certainly the 22nd and probably a few more will
>>not be saved as contiguous files (i.e. the picture is stored in at
>>least 2 separate parts), making it less probable to recover it
>>correctly - but not impossible!
>>
>>And FAT/FAT32, which all CFs are formatted using, have a table of the
>>contents of the card. An accidental format will "blank" that table
>>and leave the file data intact, but not accessible - but fortunately
>>recoverable!
>>
>>So I can only caution against deleting any pics but the last you took
>>before taking a new one, and recommend starting with a fresh
>>formatted card each time.
>
>I'm very familiar with the FAT systems, having recovered data for
>employees and/or clients of various employers I've had over the last
>15 years or so. Sometimes this had to be done with sector editors, but
>I digress.
>
>I think, however, that I've had a misunderstanding of this whole CF/SD
>issue. As I've read through this group, and I am a newcomer, I've
>noted a few posts about data lost on CF cards, but not on SD cards,
>thus I came to the conclusion that it was an issue of CF quality
>versus SD quality. Now reading your post, I wonder if each of the
>prior threads I've read have been in relation to deletion of images
>while in the camera. Though I've taken nearly 7200 images with my SD
>based camera that I've had for roughly a month and a half, and never
>had any problems in spite of a tremendous amount of cards being
>shuffled and used between three different operating environments (PCs,
>camera, and PDAs; I carry MP3s, books, web sites/trees, and other data
>on the cards along with the photos I snap) I have yet to have any loss
>with my SD cards.
>
>Still, though, that any of the roughly ten recovery tools would need
>to be a regular part of the tool set for CF users is a cause for
>extreme alarm, IMO. That a CF card's file system would "break" because
>of a simple file deletion leads me to believe that the manufacturers
>of whatever camera(s) are involved have a faulty implementation of the
>FAT storage system.
>
>Regardless, the best way to avoid data loss, IMO, is to avoid
>technologies that have a high incident ratio. For a short period of
>time, I tried several Colorado Memory Systems tape drives, and after
>learning of their unreliability, ditched them. The same holds true for
>the Syquest 270mb cartridge based system that I briefly utilized.
>Reading this group, and the treads related to data loss issues with
>respect to CF, make me appreciate that I have avoided that technology;
>I don't have time for data loss.
I bought the Iomega Zip-drive (the first one, the one with the
dreadful Click-of-Death syndrome) so the dangers of CF compared to SD
seems rather small to me when I compare the risks.
My self-experienced problems with CF is very small, having only
needed to rescue a single card so far, and that was for a co-worker
that were let down by the shop where he bought it as they said it
(the card seemed blank) probably couldn't be rescued - which took me
only 1 - 1 1/2 minutes in total for 128MB!
But if you go but the "rules" or "best practice suggestions" I still
claim that CF is both fast and realiable.
That being said, you should allow for Gumperson's law and Horner's
five thumb postulate ! (http://www.theparticle.com/murphy.html)
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