itimpi wrote:If you are using win32diskimager then you should not need to reformat the SD card. Writing a new image to the SD card will overwrite the existing contents regardless of whether you reformat or not.
If you are using 'dd' then you should not need to reformat the SD card...
AIUI, the problems ensue when the user is Windows-bound, and uses Windows-based tools on an already-partitioned-for-The-Pi SD card. The Windows-bases tools get itchy and only work with the visible partition (I.e., act for all the world as if the card is a 57M card). Hence, the frequent advice given to use the "SD Card Association tool" to ensure a clean start.
Of course, if you are using Unix/Linux/MacOSX and can use 'dd', then this is all a non-issue.
And some folks need to stop being fanboys and see the forest behind the trees.
(One of the best lines I've seen on this board lately)