Wrong size for BD-DL?

[TomHo]

Hello,

I tried to burn a BD-DL with 50 GB. The burning failed 2x during the verification process. The error was always reported at the layer switch.

After the failed burnings, I saw that ImgBurn shows wrong disc size. 50.000.000.000 Bytes would be 46,56 GiB.
Unfortunately, I added more files than this capacity. ImgBurn didn't complain and even showed more MB of free space.

Is there some wrong information within ImgBurn about the size of a BD-DL disc? It shows almost 1 GB more available space.

Nero on the other side warns correctly.

 

[LIGHTNING UK!]

The value reported in the disc info panel on the right comes from the drive / disc. It is accurate.