Can someone explain (simply please) how data can be recovered from a disk that has been zeroed.
For example say my PIN is 4567, the binary, as it is stored on the disk is :- 1,0,0 1,0,1 1,1,0 1,1,1
After zeroing, surely this becomes 0,0,0 0,0,0 0,0,0 0,0,0 so how is it possible to reconstruct my old PIN number?