When importing a dvd what does

When importing a dvd what does “recovering cells information” mean ?

It only happens on a few of my dvd but it takes a long time when it says this?

TIA

Try to look in the log file to see if there’s any info. v3 would give more details. The message indicates there’s an info mismatch in the ifo with the data structure in the vob. DRM will then try to recover by substituting blank cells, fixing table info, etc, so the import process can be completed. This message also means that it may have encountered an ARccOS disk.