from os import system as system_call

system_call("dmesg | grep \"I/O error, dev sda, sector\" > dmesgout")

with open("dmesgout") as f:
    for l in f:
        n = l.split()[7]
        a = system_call("hdparm --read-sector "+n+" /dev/sda >> /dev/null")
        print(n,a)
        if a == 1280:
            print("BAD SECTOR FOUND. RAPAIR? [y]/n")
            i = input()
            if i == "n":
                print("sector skipped")
                continue
            else:
                print("overwriting sector...")
                system_call("hdparm --yes-i-know-what-i-am-doing --write-sector "+n+" /dev/sda")
        print("continuing to next sector")