My disk is WD caviar green. I have problem with DLDIAG write zero. I cannot write zero. I have error “failed to update disk property.” Does any body knows why? I tried 2 different Pc and i have same problem. I loaded HDDscan and HDtune to view disk SMART status. Those two programs showing me ultra DMA CRC error, than i loaded DLDIAG smart. With this tool there is no error!So, which one good? I changed cables, change PC. Still CRC error and i cannot format with zero function.