в чем трабла

опять траблы с двд-румом. отказываецца монтировацца:


root@darkstar:~# mount /dev/hdb /mnt/dvd
mount: block device /dev/hdb is write-protected, mounting read-only
mount: you must specify the filesystem type
root@darkstar:~# mount /dev/hdb /mnt/dvd -t iso9660
mount: block device /dev/hdb is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/hdb,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

root@darkstar:~# dmesg | tail
EXT3-fs: unable to read superblock
hdb: command error: status=0x51 { DriveReady SeekComplete Error }
hdb: command error: error=0x54
end_request: I/O error, dev 03:40 (hdb), sector 0
FAT: unable to read boot sector
UMSDOS: msdos_read_super failed, mount aborted.
hdb: command error: status=0x51 { DriveReady SeekComplete Error }
hdb: command error: error=0x54
end_request: I/O error, dev 03:40 (hdb), sector 64
isofs_read_super: bread failed, dev=03:40, iso_blknum=16, block=32


в чем может быть трабла?