I recently used HD Tach to diagnose a Maxtor drive that PowerMax said was ok. It would run very slow intermittantly. HD Tach displays results on a graph and it showed very erratic performance. The graph was completely covered with constant huge fluctuations in speed. I retired the drive. HD Tach is certainly not a complete diagnostic program but one more tool in your toolbox.
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“Those who desire to give up freedom in order to gain security will not have, nor do they deserve, either one.”
Benjamin Franklin
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