I have a Seagate Barracuda LP Green 5900rpm HDD S/N: 5YD15W0C ST2000DL003 P/N:9VT166-300 F/W:CC31 Date:11243 Site:WU after 1 year of use, last week when i take it to another PC to transfer data, it suddenly cant recognized in BIOS, i change to 3 PC, the same problem the pc is a litter longger to continue compare to a good HDD then i google the issue and find this great Forum. i bought the USB-TTL converter and follow the hep topic to try to fix it ctrl-z F3 T> F3 T>/2 F3 2>Z F3 2>U F