How can I know If my Hard Drive is Okay???

         There are a lot of reasons why you want to test your hard drive for problems. One of the major reasons to perform a test would be if your hard drive is making a strange noise. This can often be a sign of a failing drive, something a test can point out.Some other reasons to test your hard drive would be if a defragmentation program directed you to do so or if normal troubleshooting steps for certain problems are of no help. Often times the last step is to diagnose a possible hard drive issue.
You should  test your hard drive using some of the hard drive testing software tools.
       If you're a user of Windows XP or Windows Vista, Microsoft includes a program called Error Checking which can perform some very basic tests and can even attempt to correct errors as it finds them. Most other free hard drive testing programs are supported by the hard drive manufacturers themselves and are much more powerful. Seagate, Hitachi, and Western Digital all make very popular testing programs.