I also have a Verbatim class 6, and assume I will get the same results
Not necessarily a good assumption. Given that you can never be sure with cards - and no brand seems to be immune to occasional failures - I'd recommend filling any new card end-to-end at home once if not twice before using it for real for anything at all important.
when I can find 8 hours to let my gear set and just record I'll do it
maybe I will tonite while I'm out getting other stuff done
I have been using cards now for 4 years and never felt the need to fill them before using them
Here's the long winded version of what happened:
I was just testing the auto split function, which happens to be at right around the 8GB point when running 8 tracks, the splits are at 2GB for stereo files. Because, I saw the error once when testing the auto split function before the firmware upgrade. I upgraded the firmware soon after and saw it happen again with the new firmware. So, I ran a third test and watched the deck during the crucial time. When the error popped up the third time, I knew something was wrong. That's when I posted here. I'm lucky enough to live very close to Tech-For-Less, a nationwide bulk buyer warehouse. After speaking with the sales guy I always use, he said I could try any of the 16GB cards they had in stock. I dashed over there, tried the HP/PNY 16GB card that was recommended on this thread. It worked. I did have a chance to run a utility on the Transcend card, but the card passed the tests... Also, the card utility on the DR-680 reported that the card could hold 16 GB of files. I figured that that particular card, didn't work in my recorder. Soon after, I spoke with Mr. Chang who felt the issue was with the exact card that I used, not all Transcend 16 GB cards. I'm probably going to get another one of the PNY/HP class 4 SDHC cards at TFL, since it is very cheap and I don't have to pay or wait for it to be shipped.
So, to recap:
Mr Chang at TASCAM believes that one particular Transcend, Class 6, 16 GB SDHC card didn't work in my particular recorder.
I have found that one HP/PNY, Class 4, 16GB SDHC card does work in my particular recorder.
I hope that was thorough enough to fill in all the gaps and questions. If not, let me know.
I still love this thing!