backups of backups

[johnnybgood]

Okay, I read the forum rules, and I don't think this is against the rules considering the backups came from originals, but what I am wondering is: Okay, I got Resident Evil 4, and made a back up with it on a Ritek DVD-R, and it is working just fine, at least from what I have been able to see so far, but in the past, I made some backups of backups, like I used a grand theft auto san andreas backup to make a back up -- why you ask? because the San Andreas was on a dvd+r, and I wanted to put my games on DVD-r, plus the original isn't in the best of shape(why I make backups in the first place haha)...well, I put in the dvd-r, and it freezes alot. Now, the history of my PS2 is that I have used ritek dvd+r for quite a while, and just recently switched over to DVD-r, so what I'm wondering is -- is there some data lose when you switch from different brands of dvds if you are backing up a back up, or could it just be that my laser has worn due to the usuage of DVD+r for so long? Reason I need to know this is because I am wondering if I need to get a new laser? I made a straight backup of Sly 3 a while ago, a first backup from the original, and it did do some freezing, and my system has a history of doing the whole clicking noise, freeze thing. Anyways, this is quite long. Thanks for any help.