I used the program Crystaldiskinfo on my three year old laptop disk. It gives a caution "05 reallocated sectors count current:100 worst:100 threshold:36 raw...
Reallocated Sectors Count : Raw data A50 : in decimals : 2640 Current Pending Sector Count : 78 : in decimals : 120 Uncorrectable Sector Count : 78 : in decimals : 120 Seek Error rate : 10CE63651 : in decimals : 4,511,381,073 Reported ...