Some developers have reported an issue with some SD cards used on a Tahoe-II board. The same happens to me that some SD cards are readable and other not. Martin Welford has confirmed this issue some minutes ago and announced a new release:
We have found the SD card issue. The cards that don't work are formatted with an MBR (which is not part of the SD spec, and hence not supported by the MS driver). Re-formatting and removing this is not easy to do, and we are working on a solution to this now. A new release wil follow as soon as this is sorted.
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