questo è quello che mi da dando questo comando:

# dmesg | tail
[ 196.086705] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 02 00 00 00 01 00
[ 196.086719] end_request: I/O error, dev sr0, sector 2048
[ 196.086740] UDF-fs: No anchor found
[ 196.086743] UDF-fs: No partition found (1)
[ 196.119072] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 196.119079] sr 1:0:0:0: [sr0] Sense Key : Illegal Request [current]
[ 196.119085] sr 1:0:0:0: [sr0] Add. Sense: Logical block address out of range
[ 196.119093] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 10 00 00 01 00
[ 196.119108] end_request: I/O error, dev sr0, sector 64
[ 196.119130] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16

se c'è qualcuno che ne capisce il significato e di spiegarmelo ne sarei grato.