[   16.830749] vboxdrv: Trying to deactivate the NMI watchdog permanently...
[   16.830751] vboxdrv: Successfully done.
[   16.830753] vboxdrv: Found 4 processor cores.
[   16.830834] vboxdrv: fAsync=0 offMin=0x49b offMax=0x133b
[   16.830865] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'.
[   16.830867] vboxdrv: Successfully loaded version 3.1.2 (interface 0x00100001).
[   17.241462] ppdev: user-space parallel port driver
[   21.734431] sr 4:0:0:0: [sr0] Unhandled sense code
[   21.734436] sr 4:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[   21.734440] sr 4:0:0:0: [sr0] Sense Key : Medium Error [current] 
[   21.734446] Info fld=0x1fa920
[   21.734448] sr 4:0:0:0: [sr0] Add. Sense: No seek complete
[   21.734454] end_request: I/O error, dev sr0, sector 8299648
[   21.734459] __ratelimit: 6 callbacks suppressed
[   21.734462] Buffer I/O error on device sr0, logical block 1037456
[   26.332192] eth0: no IPv6 routers present
[   53.377793] UDF-fs: No VRS found
[   53.377796] UDF-fs: No partition found (1)
[   53.421568] ISO 9660 Extensions: Microsoft Joliet Level 3
[   53.422337] ISO 9660 Extensions: RRIP_1991A