btw: Further things that could theoretically be lost in a non-image mode are files deleted and hidden in the UDF.
E.g. the kernel UDF driver can make these visible with the mount
options:
unhide Show otherwise hidden files.
undelete
Show deleted files in lists.
I'm not aware that any Video DVD would have ever used this... or even
could make use of it (since I'd guess no hardware player could read
such files).
But at least theoretically such special files might be there and - for
all the archivists amongst us ;-) - a dd-like image mode would preserve
them.
Best wishes,
Chris.
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