Sorry for my bad English, but, I really didn't understand what you meant. Anyway... I saw somewhere a discussion about "empty values" versus "0" (zeros)... since I'm considering to fix my drive using sd1a, the command goes: 1 )) - m0,2,2,0,0,0,0,22, ---->(DataPatern = "") 2 )) - m0,2,2,0,0,0,0,22,0 ---->(DataPatern = "0") 3 )) - m0,2,2,,,,,22, ---->(DataPatern = "") wich one of them is right? In case of item 2, isn't it dangerous to use 0 on DataPattern?