Abstract: The present invention relates to a method and apparatus for mirroring user data on a single hard drive. Each block of user data is written to the rotating disk or platter of the hard drive at two locations. Those two locations are on at least different surfaces of at least one platter of the hard drive system, and are also at starting locations 180° out of phase from each other. In this way, the loss of data at one of the locations on the rotating disk or platter may not be a catastrophic loss as the data block is also written on a different surface starting at a different location. In this way, user data is protected from loss caused by physical damage, mobile particulates within the sealed volume of the hard drive, and other write problems such as high fly writes.