Volumn Lables on Blu-Ray

[clever_glove]

For bizarre business logic reasons I need to be able to ID a disk by it's volume serial number.

This has worked great until Blu-ray, each time you open and close the drive door, it generates a new volume serial number.

Why does this happen, and what could I do to get a volume serial number?

I can not use the text lable, as it's the same for DVD's as Blu-Ray

example:
Volume in drive D is BLADERUNNER_FINAL
Volume Serial Number is 88C4-A6CF

[setarip_old]

Hi again!

Duplicate posting is a violation of the rules of the Doom9 Forum.

http://forum.doom9.org/showthread.php?p=1123438#post1123438

[clever_glove]

Hi again!

Duplicate posting is a violation of the rules of the Doom9 Forum.

http://forum.doom9.org/showthread.php?p=1123438#post1123438


This is Not a double post, the other is a question on how to tell if a disk is original vs burned. This post is a question on why volume labels are what they are on a blu-ray. Which is a huge nuisance, as the code previously used the film serial number on a DVD to tell what the movie was.

That is to say, it changes each time you open and close the door. Making it difficult to use as a ID.

You have to admit that's a little bit interesting, that volume label is a pointer to the disk, and the data it returns is different? Why is that? Could have something to do with the device to media key generation?



Currently I'm considering using the hash generated from CPSUnit00001.cci as it appears to be a unique per movie.

Of course this file can easily be copied... thus my next question. How to tell the disk is an original? Which is posted here:
http://forum.doom9.org/showthread.php?p=1123438#post1123438

[setarip_old]

thus my next question. How to tell the disk is an original? Which is posted here: http://forum.doom9.org/showthread.php?p=1123438#post1123438

And, thus, you've linked the two postings, because the ultimate question you are asking is, "How can I (without looking at the actual disc, detrmine if a DVD or BluRayDVD is original or burned?"