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Bug#926717: linux-image-4.19.0-4-amd64: Size of DVD in external drive not recognised properly

Short addendum after additional tests:

Apr 9, 2019, 5:00 PM by bug-reporter@tuta.io:

> Connecting the LG drive to the laptop (direct connection, no hubs
> involved) and inserting a DVD will report that DVD's total size to
> be about 1GiB.
This applies only to *video* DVDs, no matter whether they are tainted by DRM or not. Data DVDs work without problems so far.

> The LG drive works well so far for CDs. But if I insert a CD first, use it
> and replace it with a DVD, the output of 'blockdev' still shows the
> values it had for the CD and the “available size” of the DVD is limited to
> that of the CD.
Here as well, replace “CD” with “data DVD”. That means after inserting (mounting or reading is irrelevant), Video DVDs also work if the previously inserted DVD was as large or larger. While this provides some workaround that original problem persists.

I'm at a loss of ideas what the trigger could be. AFAIK video DVD *are* ordinary data DVDs with some predefined file layout.

Regards, Jan

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