When simply formating a drive, only the file catalog is erased. The contents of the disk are still there and can be recovered with special software. Zeroing the disk means writing zeros to the whole disk. In this process, malfunctioning sectors of the disk are mapped out and no longer used. Can be helpful for fixing bad drives or completely erasing the contents. To be completely sure that data cannot be recovered, the disk must be zeroed between 8 and 30 times.Mibble said:If i were to "zero" the contents of my hard drive, what exactly would the effects of that be?