2009/7/18 Bob W wrote:
> Your question "why there's any need to format cards in the first place?" is
> a good one, though. I don't see any benefit at all in having 2 functions
> that are effectively the same - Delete All, and Format. There is no benefit
> to having the Delete All function, so it should either be dropped or just
> treated as a synonym of Format.

While I never tested it myself, I suspect if you "protect" some photos
(such a option is available on *ist DS) they won't be deleted
with "Delete All", but will be deleted if you were to format the card.

What I've tried, however, is when I have other, non-Pentax files on the
card, *ist DS deletes them if I do "Delete All".

I format the card every time, even though I suspect it is a
superstition.
Once with a DS, once with an old point-n-shoot Kodak, I had strange
situations when a single file had problem being read after
I was writing files to the card (SD and CF, respectively) on a computer,
via card reader. I wrote to a card many times after without a problem,
but that was enough for me to have formatting as a part of the routine.

P. J. Alling wrote:
> I believe that all cameras will reformat cards that they see as 
> unformatted automatically.  I say this because I've put brand new cards 
> into the K20D, *ist-D, and Ds and the minute that they are accessed the 
> card has the proper directory structure.  The K20 *ist-D and *ist-Ds all 
> upon having brand new cards inserted, created the DCMI and 100Pentx sub 
> directories.  If the card wasn't formated it would have done be at that 
> time.  I've never had to do an initial format on any SD or CF card.

Don't mix two things:
formatting the card (which erases FAT information) and
initializing the card for the camera needs (which creates
camera-specific directories on the card).
When you tell camera to "Format", both things happen.

When you get a brand-new card, it is already formatted. The camera
just creates its directories. (AFAIK, this happens when it records the
first image, not when you just pop it in, - at least in the cameras
I've used.)

While I've never tried it, - I suspect if you format card in your
computer to any other file system, say NTFS, - and pop it into the
camera, and try to shoot, - it won't reformat the card by itself.

Igor


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