Red Hat Enterprise Linux で Buffer I/O error on device sr0 メッセージが出力される

Issue

• cd-rom/dvd-ram で何の操作もしていない、もしくはディスクがないにも関わらず、Buffer I/O error on device sr0 メッセージが複数出力されます。

Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 0
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 1
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 2
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 3
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 4
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 5
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 6
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 7
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:Device not ready
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:SCSI error: return code = 0x08000002
Jul  8 16:21:48 localhost kernel:Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE,SUGGEST_OK
Jul  8 16:21:48 localhost kernel: sr0:Current: sense key:Not Ready
Jul  8 16:21:48 localhost kernel:     Add.Sense:Medium not present - tray closed
Jul  8 16:21:48 localhost kernel:
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 0
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 1
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:Device not ready
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:SCSI error: return code = 0x08000002
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:[sr0] Unhandled sense code
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:[sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:[sr0] Sense Key :Medium Error [current]
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:[sr0] Add.Sense:Unrecovered read error
Jul  8 16:21:48 localhost kernel: sr 2:0:0:0:[sr0] CDB:Read(10):28 00 00 00 00 80 00 00 02 00
Jul  8 16:21:48 localhost kernel:Buffer I/O error on device sr0, logical block 64