text: how can i check bad sectors? i am going to buy a 2nd hand seagate hard drive from a guy ,but i dont know how 2 check out about bad sectors can any1 tell me commands and other metods 2 check physical and logical bad sectors, make the new hd ,as  a slave one , go to my computer , then mark that hd may its now named e,f,g,h.., right click ur mouse go ( properties , tools , check now , mark the white boxes for bad sectors and clean ), it will chk it the next time reboot , and will give u a notification about it