Hi Gradius2, THANKS x 1000 !!! I have a Maxtor DiamondMax 22 500 Gb SMT3500320AS wich had the BSY error. I have followed exactly your tutorial and all is ok now !!! I didn't need to connect ground on the PCB. I didn't need to do the G list optional. I was blocked after the commande : F3 T>m0,2,2,,,,,22 (non response for 30 minutes). So I power off the Sata, wait 10 seconds, power on, wait 30 seconds, ctrl Z, and F3 T>m0,2,2,,,,,22 again : after 2 minutes, the good answer on the terminal !!!! I must say that on the Maxtor rx goes to rx and tx to the tx. :thumbup :thumbup Thanks a lot for all this work, you(re the best ! Nicolas