Re: Help with UDF and BluRay disks
On Fri, 2025-01-17 at 23:37 -0800, Bob McGowan wrote:
> Hello list,
>
> I've been trying to figure out how to use my BD disc writer to create
> backups of files.
>
> What I first found were instructions to create an empty file of the
> propper size, 'mkudffs file', loop mount it, copy files to it,
> unmount
> and burn to the BD disc.
>
> Doing this resulted in a BD disk that was not accessable, except by
> raw
> reading, like 'dd'. Attempting to mount it generates the error
> "wrong
> fs type, bad option, bad superblock on /dev/sr0, missing codepage or
> helper program, or other error".
>
> Reading the man page for 'mkudffs', I found there is a '-m' switch to
> specify the type of media and it defaults to 'hd'. So I tried to
> make
> one with the 'bdr' type but when I tried to loop mount it, it
> generated
> the same error mentioned above.
>
> So it looks like media type limits prevent using this method.
>
> Further searching found that the recommended way to access UDF
> filesystems on optical media is to use "packet writing".
>
> For the life of me I cannot figure out how to make this work. None
> of
> the suggestions I've found work with my setup.
>
> It may be that my BD drive is too old but before going the route of
> changing it out, I'd like to know if there's something I've missed in
> the general process.
>
> Thanks,
>
> Bob
And of course, I forgot to mention any details about my environment.
I am running Debian 12.9 which is up to date, kernel (6.5.0-0.deb12.4-
amd64). The DB burner is an LG and is quite old, as in maybe 15 years.
The system has 16GB ram and an AMD Ryzen 3 1200 Quad-Core Processor on
a relatively newer ASUS motherboard.
Thanks,
Bob
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