May  8 22:56:38 X200MA kernel: [   88.693149] blk_update_request: critical medium error, dev sr0, sector 262136
May  8 22:56:38 X200MA kernel: [   88.699475] sr 4:0:0:0: [sr0] FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
May  8 22:56:38 X200MA kernel: [   88.699484] sr 4:0:0:0: [sr0] Sense Key : Medium Error [current] 
May  8 22:56:38 X200MA kernel: [   88.699489] sr 4:0:0:0: [sr0] Add. Sense: Unrecovered read error
May  8 22:56:38 X200MA kernel: [   88.699495] sr 4:0:0:0: [sr0] CDB: Read(10) 28 00 00 00 ff fe 00 00 02 00
May  8 22:56:38 X200MA kernel: [   88.699500] blk_update_request: critical medium error, dev sr0, sector 262136