Burning backup to dvd

[Tony Nelson]

At 5:47 PM +0100 7/26/06, Anne Wilson wrote:
 ...
>It looks as though the media was at least part of the problem.  Changing to a
>different brand disk got me a complete burn, no error messages whatsoever.
>However, I find I cannot read the disk.  It is not automounting.  For a
>manual mount, is the type iso9660?
>
>dmesg|tail
>cdrom: This disc doesn't have any tracks I recognize!
>
>Doesn't look good

Can the disk be read at all?

    # dd if=/dev/dvd of=/dev/null bs=2048 count=10000000

That should read as many blocks as written.  If it fails after 1 block,
well, I've seen that but don't know a cure other than not to use cdrecord
for DVD+Plus.
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