dmesg | tail
[ 4628.404658] sd 3:0:0:0: [sdb]  
[ 4628.404662] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 4628.404666] sd 3:0:0:0: [sdb]  
[ 4628.404669] Sense Key : Medium Error [current] 
[ 4628.404675] sd 3:0:0:0: [sdb]  
[ 4628.404679] Add. Sense: Unrecovered read error
[ 4628.404683] sd 3:0:0:0: [sdb] CDB: 
[ 4628.404685] Read(10): 28 00 0d f9 3e f8 00 00 08 00
[ 4628.404698] end_request: critical medium error, dev sdb, sector 234438392
[ 4628.404705] Buffer I/O error on device sdb2, logical block 29278943