Data Placement on Burned CD/DVD/BluRay media?

What about these links? (from Google)

http://en.wikipedia.org/wiki/ISO_9660

http://users.telenet.be/it3.consultants.bvba/handouts/ISO9960.html

as far as i know in simple words, without referring to above links.........

the cds, dvds layers are burnt ( varying depths) with the heat concentrated by lasers on the disc with respect to the type of data burnt , starting from inner egge and spirally across to the edge.... when inserted into dvd players, the light from lens falls on these burnt areas and as the disc rotates , the burnt datas are reproduced for the user to download and save in the same hapazardly stacking hard disc.

Are you trying to recover data from CDs/DVDs with errors on them? What do you need to know for please?

In regards to last post.... I am trying to understand the placement of the data to see if intentional orphanization of a file system could be used to protect media from being pirated. Unless a bit for bit burn was accomplished where the software didnt care about the file system and data on it, it would otherwise come up with a failure to burn. The software is located on the inner most track of the disk so when the software seeks to run it, it runs fine until it goes past the intentionally orphaned location of the disk. Hidden on the opposite sid eof the orphaned file system data would be code that is required for the software to function, so without the media present the software doesnt work. This also protects from people using windows explorer and simply copying the readable data off of the track leading to the orphan position.

Interesting, this is not completely dissimilar to the way software was made anti pirate proof, for a short time at least, with a laser burnt hole at some point.....

There is plenty of software around that will recover all readable data on a CD/DVD before or after an area with data loss, so it may not be worth your while......ISO Buster is a freeware example....

Thanks for explaining your reasons, that helped me understand where you want to go....