How to read corrupt disc

Question

I have a corrupt mini DVD, which was used in a camcorder. It appears to be corrupt (did not play on camcorder) and won't open. I don't know what to try to fix it. Is there a way?

billy@marara-ubu:/media$ sudo mount -t udf -o ro /dev/sr0 /media/cd
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

billy@marara-ubu:/media$ sudo mount -t iso9660 -o ro /dev/sr0 /media/cd
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

billy@marara-ubu:/media$ sudo cdrwtool -i -d /dev/sr0 
using device /dev/sr0
448KB internal buffer
setting write speed to 12x

DISC INFO:
        erasable : No
        border = 2
        Disc status = 1
        number of first track = 1
        number of sessions = 1
        number of tracks = 1
        status of last track = 3
        uru = 1
        did_v = 0
        dbc_v = 0
        disc type = 0
        disc_id = 0
        lead_in = 00:00:00 (0)
        lead_out = 00:00:00 (0)
        OPC entries = 0

TRACK INFO:

Track 1
        track_number = 1
        session_number = 1
        damage = 0
        copy = 0
        track_mode = 4
        Rt = 1
        blank = 1
        packet = 1
        fp = 0
        data_mode = 1
        lra_v = 0
        nwa_v = 0
        track_start = 0
        next_writable = 0
        last_recorded = 0
        free_blocks = 12272
        packet_size = 16
        track_size = 12272 (24544KB)

Track 2
        track_number = 2
        session_number = 1
        damage = 0
        copy = 0
        track_mode = 4
        Rt = 1
        blank = 1
        packet = 1
        fp = 0
        data_mode = 1
        lra_v = 0
        nwa_v = 0
        track_start = 12288
        next_writable = 12288
        last_recorded = 0
        free_blocks = 176
        packet_size = 16
        track_size = 176 (352KB)

Track 3
        track_number = 3
        session_number = 1
        damage = 1
        copy = 0
        track_mode = 4
        Rt = 0
        blank = 0
        packet = 1
        fp = 0
        data_mode = 1
        lra_v = 0
        nwa_v = 0
        track_start = 12480
        next_writable = 0
        last_recorded = 0
        free_blocks = 0
        packet_size = 16
        track_size = 701472 (1402944KB)

Answer 1

I would try using sudo dd if=/dev/cdrom of=dvd.img where /dev/cdrom is your drive device path. This would create an image of the disc, trying to recover data in the process. Then you may try testdisk if the image that dd produces is garbage.

Answer 2

It might not be under /dev/cdrom because it isn't mounted as one.

Do this: remove the mini-disc and run mount, put it in and run mount again. Any difference? If there is, you might be in luck. If that is the case, you should be able to dd the heck out of it.