The thing about DVD-R media is that quality makes a huge difference. Some brands you would expect decent quality from (memorex) use really crappy dyes. I've burned memorex DVD-Rs in my desktop pioneer DVD-R/RW drive and some things will read them, somethings won't. Whether these low quality discs will read on your device depends on the strength of the device's read laser.
I'll use Xbox's as an example. The read lasers in X-box drives are calibrated till they fall into a certain power range. Some end up on the lower end of the range, some on the higher. The ones that end up in the lower range often have trouble reading cheap media... my xbox for example. Using cheap discs like Princos, my xbox will only attempt to play my movie backups half the time. The ones that do load are often plagued with playback glitches. I can take these same discs and put them in my friend's xbox and they work fine. I can take these same discs and put them in my standalone DVD player and they work fine.
So to make sure I have no problems, I always use ritek media (or brands that use ritek dye). These discs have the best quality dye that I have found, and they've played in every device I've put them in.
If the discs are reading fine on other devices, it might be that the read laser on the 5100a is a bit weak for DVD-R. The discs seem to be writing fine though, so hopefully using better quality media will eliminate the weak read laser problem, if that is the problem...
All speculation of course.
I'll use Xbox's as an example. The read lasers in X-box drives are calibrated till they fall into a certain power range. Some end up on the lower end of the range, some on the higher. The ones that end up in the lower range often have trouble reading cheap media... my xbox for example. Using cheap discs like Princos, my xbox will only attempt to play my movie backups half the time. The ones that do load are often plagued with playback glitches. I can take these same discs and put them in my friend's xbox and they work fine. I can take these same discs and put them in my standalone DVD player and they work fine.
So to make sure I have no problems, I always use ritek media (or brands that use ritek dye). These discs have the best quality dye that I have found, and they've played in every device I've put them in.
If the discs are reading fine on other devices, it might be that the read laser on the 5100a is a bit weak for DVD-R. The discs seem to be writing fine though, so hopefully using better quality media will eliminate the weak read laser problem, if that is the problem...
All speculation of course.
