I had the same issue, i have to go with the media on this one. As you did i got a pack of 15, i burned about 7-8 coasters. They are to date one of the only media types ive had any problems with at all ( the other being some EXTREMELY cheap generic type dl media.) Honestly i would stick with verbatim if you have the funds too. After the coasters from the memorex, ive used nothing but verbs and havent looked back since
If your drive cannot handle IP DL discs but many other drives can, is the problem with the discs or your drive or simply an incompatibility between the two? (Before you answer, consider the fact that your drive manufacturer can alter the drive settings with a firmware to make it compatible if he thinks it's worthwhile; but the disc manufacturer cannot make changes. Ritek is making them that way because the yield and quality are better than alternative methods, and they can charge less for each disc.) If the drive can be improved for better performance, but is not, then blaming the media, which work with other drives, seems a bit misdirected.
A good drive, even an excellent drive, can still be incompatible with certain types of discs. If you had 7-8 coasters from a pack of 15, the 8-7 that did work are probably bad recordings that will fail to play later on. Poor quality discs are only one of dozens of reasons for a bad recording. Incompatibility of disc and drives is the foremost reason.
Ok here is an update. It seems burns are far more stable at 4X than 2.4X when using memsuxors and verbs. When I burn Memo at 2.4X burn will always fail at leadin under circumstance I posted above. However same media is fine at 4X. HOWEVER at 4X and read on XBOX 360, videos are choppy meaning bad results even though burn was successful. But damn, these things are so cheap! $32 to 50 shipped at the newegg!
I've always burned Verbatim & Memorex 8X +R DL media at 4x & both play back fine in a standalone DVD recorder. Test burns with both brands at 8X also play back without any problems so I guess my computers DVDR drive likes both types of media. 2.4x takes longer to burn which is why I don't try to track down 2.4x media anymore although I have used it in the past.
bought a 30 pack of memorex, trying to save money....not a good idea. None of them worked. Bought a 3 pack of verbatims, all of them worked.
Hardwatch-- It's not a good idea for you only because your drive apparently does not have the firmware to record properly to inverse stack DL discs. Verbatim DL discs still use the original photo polymer method that is more expensive, wasteful, and difficult to control. BurningAS-- The choppy results on the XBOX 360 could also be the result of its drive having a difficult time reading inverse stack DL discs "upside down." The recording quality may or may not be OK; but if only one drive is having a problem, one has to consider limitations of the drive itself as a factor. Those 8X discs need higher recording speeds because the dye is tuned for faster speed. Although dyes have a much wider range of speeds than rewritable semi-metal alloys, they still have limits. Using the slowest speed for discs with high rated speeds often increases error rates, as you found with those 8X discs recorded at 2.4X (and with 52X phthalocyanine CD-Rs recorded at speeds below 8X). Using a recording speed at half a disc medium's rated speed is a good idea, but speeds below that can be even more troublesome than the rated speed.