udo badblocks -f -s /dev/sda2
Checking for bad blocks (read-only test): 12578404done, 4:45 elapsed. (0/0/0 errors)
12578405done, 4:48 elapsed. (1/0/0 errors)
12578406done, 4:52 elapsed. (2/0/0 errors)
12578407done, 4:55 elapsed. (3/0/0 errors)
12578408done, 4:59 elapsed. (4/0/0 errors)
12578409done, 5:02 elapsed. (5/0/0 errors)
12578410done, 5:06 elapsed. (6/0/0 errors)
12578411done, 5:10 elapsed. (7/0/0 errors)
^C4.28% done, 5:37 elapsed. (8/0/0 errors)