mount: wrong fs type, bad option, bad superblock on /dev/hdd, missing codepage or other error In some cases useful info is found in syslog - try dmesg | tail or so debian:/media# dmesg | tail hdc: command error: error=0x50 end_request: I/O error, dev 16:00 (hdc), sector 22 cdrom: open failed. ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root cdrom: open failed. hdd: command error: status=0x51 { DriveReady SeekComplete Error } hdd: command error: error=0x54 end_request: I/O error, dev 16:40 (hdd), sector 64 isofs_read_super: bread failed, dev=16:40, iso_blknum=16, block=32