> On Sun, Apr 26, 2009 at 12:10:35PM -0400, Matthew Miller scripsit: > > On Thu, Apr 23, 2009 at 09:12:25PM +0100, Bob W wrote: > > > I should think the difference is fairly minimal. To > delete all, the system > > > probably just sets a 'deleted' status for each file entry > in the FAT, > > > whereas to format the card I expect it simply writes a > new FAT. In either > > > case I'd be surprised if there was any great difference > in the number of > > > I/Os. > > > > On my K10D, it's significantly slower to delete-all. > > Delete all = couple hundred to a couple thousand operations > on the FAT, > depending on the number of files on the card. Especially in > the camera, > it's probably a case of "open FAT, delete file #1, write FAT back out, > close FAT, open FAT, delete file #2, ....". >
it's highly unlikely to commit the FAT to disk after every delete. It would be spectacularly inefficient and pointless. Bob -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
