Originally Posted by cybmole

this data will be somewhere in video_ts.ifo.

to solve the problem, someone needs to examine this file a) on an original DVd, b) on a dvdfab rip
c) on a backup made as described

above & work out what changes.

use a tool like ifoedit or pcgedit.

this is a technical dvd structure issue & has nothing to do with the merits or demerits of clearplay technology.

I tend to agree with the original OP that a program like dvdfab which claims to make exact backups should be usable for his purposes, especially if he's paid for the program!

so even though I do not in any way support clearplay, I do support his quest for a workable backup procedure, especially as it now seems that rival products re able to do the job successfully.

I am not skilled at deciphering .ifo files though so hopefully someone else will now lend a hand.