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