Its amazing seeing one actually working! http://www.anonym.to?http://media1.break.com/dnet/media/2007/5/how-a-computer-hard-drive-works.wmv
very cool, never seen one in action like that! they really get cranking! I wonder if that was 5400rpm, 7200rpm. the arm looks so violent...no wonder they tend to fail after a few years!
thats a nice explanation actually, but then harddisk works in vacume, i mean the air should not have any particle more than 3 microne big![a human hair is about 100 micron thich] so, the harddisk will get couroupted anyways!