The syslog indicates a problem with the CD:
Apr 25 10:24:55 kernel: [ 854.962626] sr 0:0:0:0: [sr0] Unhandled sense code Apr 25 10:24:55 kernel: [ 854.962633] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Apr 25 10:24:55 kernel: [ 854.962642] sr 0:0:0:0: [sr0] Sense Key : Medium Error [current] Apr 25 10:24:55 kernel: [ 854.962651] Info fld=0x55458 Apr 25 10:24:55 kernel: [ 854.962655] sr 0:0:0:0: [sr0] Add. Sense: L-EC uncorrectable error Apr 25 10:24:55 kernel: [ 854.962664] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 05 54 57 00 00 02 00 Apr 25 10:24:55 kernel: [ 854.962683] end_request: I/O error, dev sr0, sector 1397088 Apr 25 10:24:56 kernel: [ 856.455459] sr 0:0:0:0: [sr0] Unhandled sense code Apr 25 10:24:56 kernel: [ 856.455466] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Apr 25 10:24:56 kernel: [ 856.455475] sr 0:0:0:0: [sr0] Sense Key : Medium Error [current] Apr 25 10:24:56 kernel: [ 856.455483] Info fld=0x55364
The syslog indicates a problem with the CD:
Apr 25 10:24:55 kernel: [ 854.962626] sr 0:0:0:0: [sr0] Unhandled sense code DRIVER_ SENSE DRIVER_ SENSE
Apr 25 10:24:55 kernel: [ 854.962633] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=
Apr 25 10:24:55 kernel: [ 854.962642] sr 0:0:0:0: [sr0] Sense Key : Medium Error [current]
Apr 25 10:24:55 kernel: [ 854.962651] Info fld=0x55458
Apr 25 10:24:55 kernel: [ 854.962655] sr 0:0:0:0: [sr0] Add. Sense: L-EC uncorrectable error
Apr 25 10:24:55 kernel: [ 854.962664] sr 0:0:0:0: [sr0] CDB: Read(10): 28 00 00 05 54 57 00 00 02 00
Apr 25 10:24:55 kernel: [ 854.962683] end_request: I/O error, dev sr0, sector 1397088
Apr 25 10:24:56 kernel: [ 856.455459] sr 0:0:0:0: [sr0] Unhandled sense code
Apr 25 10:24:56 kernel: [ 856.455466] sr 0:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=
Apr 25 10:24:56 kernel: [ 856.455475] sr 0:0:0:0: [sr0] Sense Key : Medium Error [current]
Apr 25 10:24:56 kernel: [ 856.455483] Info fld=0x55364