~$ isoinfo -d dev=/dev/hdd isoinfo: Success. test unit ready: scsi sendcmd: no error CDB: 00 00 00 00 00 00 status: 0x2 (CHECK CONDITION) Sense Bytes: 70 00 02 00 00 00 00 0A 00 00 00 00 3A 00 00 00 Sense Key: 0x2 Not Ready, Segment 0 Sense Code: 0x3A Qual 0x00 (medium not present) Fru 0x0 Sense flags: Blk 0 (not valid) cmd finished after 0.000s timeout 20s isoinfo: Success. Unable to open /dev/hdd