You might be able to use a different disc.
If you explained what your trying to do and on what model, someone might be able to help better.
All I can do not knowing the true goal is to sort of throw ideas at the wall that might help.
This is a screenshot of an old conversion sheet posted to a forum in German many years ago.
I don't know if it will help, but take a look.
: the Japanese and Asian models, even if they share the same numbers are explicitly (not) listed. I don't know if they would work on those.. I have a few I was going to test later this Summer to see.
Certainly [never, ever, never !
] try to update the firmware on any of these models. The risk is too high you can get a version that is incompatible with your model and brick it forever.
I dunno about New Zealand (Oceania zone ? ).
I have one Pioneer recorder from there and its very unique.
The DVR-920, DVR-930 and DVR-940 "seem" to be from the same families designated by the second digit.. but they are so rare where I live its hard to tell. They aren't on the German datasheet for CPRM discs but I think they were only sold at "All or Universe" stores in the EU so they were rare even there.
I would really like to find a GGV1302 as well, but its a very rare and hard to find item. I think everyone who had that disc have moved on from this world.
My (guess) is the GGV1302 is for North American recorders.
My (guess) is the GGV1321 is for European / UK recorders.
I would (guess) there is a GGV for the Asian or Japanese recorders.. but I've never seen or heard of the actual number. It may have only been available in those markets.
I do know from visiting very old Japanese forums that one customer described the same procedure for replacing his hard drive in his recorder when a Pioneer technician visited his home to perform the hard drive swap.
I don't read Japanese, but Google translate will now take a screenshot of Kanji characters and turn them into English on demand. Google would not work with unicode cut and paste.. so until recently I had no way of reading these really old forum posts which are dying off and being removed as their posters are no longer around.
This is (also Theory) but I would (guess) a Type 1 disk is for North America and a Type 2 disk is for Europe / UK which might mean they are based on the old DVD Region codes.
So I don't know if Type 1 vs Type 2 refers to age or simply the region in which they should be used.
I wish I knew an old Pioneer repair shop or technician I could ask for sure.. I hate "guessing" all the time.