Thank you for the info, pepst
Can´t say that CMC-media is general good quality but what you wrote sounds like the U-Value labeled C-grade-media or fakes? ButI fakes have mostly MCC, TY or Ricoh-Mid.
This year I burned more than 20 Mids of DVD-media with more than 10 drives and the MBI-media had overall the worst results, no matter which writer or speed. Even my TYG02-fakes had with some writers better results, also my "new" PRINCO 1x-media shows MUCH better results with a suitable writer which know the Mid and don´t use 4x-speed with a universal-write-strategy.
And so back to Umedisc
I will try soon what quality I get with the DL-media. I took a look in some FWs with MSCE, and yep, my older drives don´t know this Mid and I guess 2,4x speed gets maybe used.
Newer drives show this Mid and lowest speed was 4x, even with my not so new AD-7173A.
So you are sure lower speed is the only way to burn Ume DL readable? This means the FW-progarmmers did an awful job with the strategy/speed with this Mid or the mechanical quality is so bad that the media joggles and vibrates so hard that the laser had a hard time to follow the track (sorry for this sentence ).
Maybe a different writing-strategy works better, e.g. Ricoh D00 or CMC MAG D01?
I took a look in the Blank media section, the last scans of Ume DL don´t look that bad
Some ppl say they don´t will miss Ume, I would miss them. Ume02 and AML003 works in some of my writers much better than MBI. And MBI is omnipresent in so many brands here, Ume/AML I only found in Intenso.