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Bad Luck with Hard Drives
depending on manufacturer of hard drive, you can usually download a diagnostic floppy disk that you can boot off of that will run tests on it. You can also write zeros to the drive and usually change partitions also.
Download disk from manufacturer's web site.
I know Western Digital's works well but will not work with other brands. Everyone may not agree, but I always buy Western Digital Hard Drives because I've had such good luck with them.