Diagnostic tools such as DLG and smartmontools are independent of the file system. They test the drive at the hardware level.
The following attributes confirm that your drive has numerous bad sectors.
5 Reallocated_Sector_Ct PO--CK 158 158 140 - 809
196 Reallocated_Event_Count -O--CK 199 199 000 - 1
197 Current_Pending_Sector -O--CK 193 193 000 - 1288
198 Offline_Uncorrectable ----CK 187 187 000 - 2252
The Reallocated_Sector_Ct is reporting that 809 bad sectors have been replaced with spares, while the Current_Pending_Sector attribute is telling you that 1288 bad sectors are waiting to be replaced. IIUC, the Offline_Uncorrectable attribute is reporting that 2252 sectors have been assessed as bad during background scanning.
The following attributes should ideally have raw values of 0.
1 Raw_Read_Error_Rate POSR-K 200 200 051 - 9
7 Seek_Error_Rate -OSR-K 200 199 000 - 33
200 Multi_Zone_Error_Rate ---R-- 179 179 000 - 4221
In short your drive is very ill and should be replaced ASAP.
