Archived posting to the Leica Users Group, 2011/08/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hey! If those cards are linked to the sovereign rating of the US, they are AA+. Or a more complete answer, split-rated at Aaa/AA+/AAA. -rei On 08/09/2011 11:49 AM, mehrdad wrote: > are these cards AAA or AA-? > > On Tue, Aug 9, 2011 at 8:41 AM, Spencer Cheng<spencer at aotera.org> > wrote: > >> On Aug 9, 2011, at 21:50, Forrest Herr wrote: >>> The reason they are advising against formatting your older cards >>> is because Flash memory has a finite number of write cycles. This >>> means that if you perform lots of write operations on your Flash >>> memory, eventually it will wear out, and you will experience data >>> loss. The other side effect is that your camera might behave >>> strangely because it is trying to read or write to "bad" sectors on >>> the memory card, which can cause the camera to lock up. >>> >> The number of write cycle w/o wear levelling for modern's flash cards is >> 100K+ write cycles ie. you have to take at least 50K pictures * number of >> pictures that fits on the card before wear should become an issue. As very >> few photographers gets to that level of write cycles on any single SD >> card, >> I am not sure why Leica would offer this advice. >> >>> It sounds like users are experiencing problems with bad memory, or >>> heavily used memory cards. So if you're shooting professionally it >>> would be prudent to cycle your older memory cards out of use after a >>> year or two. >> Possibly but that means the pro would have to fill that card about 50K >> times before it wears out. Assume 400 images per card, that is 20 million >> images has to be taken with that card. That's a lot of images on a single >> card. I would guess the camera is obsolete long before the card wears out. >> >> SD cards do go bad but for photographic purposes, wear doesn't seem to be >> an real problem. >> >> Regards, >> Spencer >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > >