By the end of January 2011, almost all new hard drives sold will have switched to a new format that will increase their size and efficiency, but will leave those clinging to Windows XP frustrated. Traditionally, data on hard disks has been broken up into 512 byte chunks. Each broken-up sector requires additional space on a physical disk to mark the beginning and the end of each piece. Extra space is also needed for error correction, and there needs to be a bit of room to separate it from the next chunk. This wasn't much of a problem when the...