chris@chris-desktop:~$ sudo badblocks -sv /dev/sdb1 
[sudo] password for chris: 
Checking blocks 0 to 1465134823
Checking for bad blocks (read-only test): 720111260one, 2:16:10 elapsed. (0/0/0 errors)
720111261one, 2:16:13 elapsed. (1/0/0 errors)
720111262one, 2:16:16 elapsed. (2/0/0 errors)
720111263one, 2:16:19 elapsed. (3/0/0 errors)
720111264one, 2:16:22 elapsed. (4/0/0 errors)
720111265one, 2:16:25 elapsed. (5/0/0 errors)
720111266one, 2:16:28 elapsed. (6/0/0 errors)
720111267one, 2:16:31 elapsed. (7/0/0 errors)
720111268one, 2:16:34 elapsed. (8/0/0 errors)
720111269one, 2:16:37 elapsed. (9/0/0 errors)
720111270one, 2:16:40 elapsed. (10/0/0 errors)
720111271one, 2:16:42 elapsed. (11/0/0 errors)
720969504one, 2:16:59 elapsed. (12/0/0 errors)
720969505one, 2:17:02 elapsed. (13/0/0 errors)
720969506one, 2:17:05 elapsed. (14/0/0 errors)
720969507one, 2:17:08 elapsed. (15/0/0 errors)
720969508one, 2:17:11 elapsed. (16/0/0 errors)
720969509one, 2:17:14 elapsed. (17/0/0 errors)
720969510one, 2:17:17 elapsed. (18/0/0 errors)
720969511one, 2:17:20 elapsed. (19/0/0 errors)
720969512one, 2:17:23 elapsed. (20/0/0 errors)
720969513one, 2:17:26 elapsed. (21/0/0 errors)
720969514one, 2:17:29 elapsed. (22/0/0 errors)
720969515one, 2:17:32 elapsed. (23/0/0 errors)
720969516one, 2:17:35 elapsed. (24/0/0 errors)
720969517one, 2:17:38 elapsed. (25/0/0 errors)
720969518one, 2:17:41 elapsed. (26/0/0 errors)
720969519one, 2:17:44 elapsed. (27/0/0 errors)
720969520one, 2:17:47 elapsed. (28/0/0 errors)
720969521one, 2:17:50 elapsed. (29/0/0 errors)
720969522one, 2:17:53 elapsed. (30/0/0 errors)
720969523one, 2:17:55 elapsed. (31/0/0 errors)
720969524one, 2:17:58 elapsed. (32/0/0 errors)
720969525one, 2:18:01 elapsed. (33/0/0 errors)
720969526one, 2:18:04 elapsed. (34/0/0 errors)
720969527one, 2:18:07 elapsed. (35/0/0 errors)
720969528one, 2:18:10 elapsed. (36/0/0 errors)
720969529one, 2:18:13 elapsed. (37/0/0 errors)
720969530one, 2:18:16 elapsed. (38/0/0 errors)
720969531one, 2:18:19 elapsed. (39/0/0 errors)
721865596one, 2:18:36 elapsed. (40/0/0 errors)
721865597one, 2:18:39 elapsed. (41/0/0 errors)
721865598one, 2:18:42 elapsed. (42/0/0 errors)
721865599one, 2:18:45 elapsed. (43/0/0 errors)
721865600one, 2:18:48 elapsed. (44/0/0 errors)
721865601one, 2:18:51 elapsed. (45/0/0 errors)
721865602one, 2:18:54 elapsed. (46/0/0 errors)
721865603one, 2:18:57 elapsed. (47/0/0 errors)
989536964one, 3:32:02 elapsed. (48/0/0 errors)
989536965one, 3:32:05 elapsed. (49/0/0 errors)
989536966one, 3:32:08 elapsed. (50/0/0 errors)
989536967one, 3:32:11 elapsed. (51/0/0 errors)
989536968one, 3:32:14 elapsed. (52/0/0 errors)
989536969one, 3:32:17 elapsed. (53/0/0 errors)
989536970one, 3:32:20 elapsed. (54/0/0 errors)
989536971one, 3:32:23 elapsed. (55/0/0 errors)
989536972one, 3:32:26 elapsed. (56/0/0 errors)
989536973one, 3:32:29 elapsed. (57/0/0 errors)
989536974one, 3:32:32 elapsed. (58/0/0 errors)
989536975one, 3:32:35 elapsed. (59/0/0 errors)
989536976one, 3:32:38 elapsed. (60/0/0 errors)
989536977one, 3:32:41 elapsed. (61/0/0 errors)
989536978one, 3:32:44 elapsed. (62/0/0 errors)
989536979one, 3:32:47 elapsed. (63/0/0 errors)
989536980one, 3:32:50 elapsed. (64/0/0 errors)
989536981one, 3:32:53 elapsed. (65/0/0 errors)
989536982one, 3:32:56 elapsed. (66/0/0 errors)
989536983one, 3:32:58 elapsed. (67/0/0 errors)
989536984one, 3:33:01 elapsed. (68/0/0 errors)
989536985one, 3:33:04 elapsed. (69/0/0 errors)
989536986one, 3:33:07 elapsed. (70/0/0 errors)
1078703484ne, 3:57:11 elapsed. (71/0/0 errors)
1078703485ne, 3:57:14 elapsed. (72/0/0 errors)
1078703486ne, 3:57:17 elapsed. (73/0/0 errors)
1078703487ne, 3:57:20 elapsed. (74/0/0 errors)
1078703488ne, 3:57:23 elapsed. (75/0/0 errors)
1078703489ne, 3:57:26 elapsed. (76/0/0 errors)
1078703490ne, 3:57:29 elapsed. (77/0/0 errors)
1078703491ne, 3:57:32 elapsed. (78/0/0 errors)
1078703492ne, 3:57:35 elapsed. (79/0/0 errors)
1078703493ne, 3:57:38 elapsed. (80/0/0 errors)
1078703494ne, 3:57:41 elapsed. (81/0/0 errors)
1078703495ne, 3:57:44 elapsed. (82/0/0 errors)
1078703496ne, 3:57:47 elapsed. (83/0/0 errors)
1078703497ne, 3:57:50 elapsed. (84/0/0 errors)
1078703498ne, 3:57:53 elapsed. (85/0/0 errors)
1078703499ne, 3:57:56 elapsed. (86/0/0 errors)
done                                                 
Pass completed, 87 bad blocks found. (87/0/0 errors)