On 6/18/2016 1:36 PM, Chuck Norcutt wrote:
See if you can reproduce the problem with a very deliberate test.
Regardless of the outcome, stick the card in your computer and format it. Assuming Windows it will want to do a
"quick format" and put a check mark next to the "quick format" option. Uncheck the "quick format" option. Tell it to
go and be prepared to wait awhile. The full format will write to every sector of the card and note any errors.
Yeah, well, if it were a HD, sure. But it's an SD card with load leveling. The controller decides where to put stuff
entirely aside from what it tells the outside world. Two different runs of the Windoze formatter the way you suggest may
actually write to and read back different physical memory for some the same reported locations. I believe the SD
controller is supposed to do its own evaluation(s) to mark bad sectors as the card ages. Assuming the problem is the
card, it could be controller failure.
SDFormatter is a better bet. And using a different card altogether for the test
is a better test yet.
Relocable Moose
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