The DataFrame has been designed for maximum reliability. However, occasionally, a disk may become unreadable due to software corruption or other factors. In such a case, you may lose all your valuable files forever.
To avoid this possibility, you should back up (make a duplicate of) the files on your disk on a regular basis. That way, should your hard disk ever have problems, you will have a copy of your files available.
Your DataFrame comes with DiskFit, a utility designed to make the process of backing up as simple and speedy as possible. With DiskFit, it takes only a few minutes a day to provide yourself the security of a complete backup.