I can only speak for my RDR-HX780 and what it says in the manual that came in the sealed box. And how quietly it burns 16x discs that seem to work just fine.
Word for word from Page 119 of manual
Usable disc versions (as of April 2008)
- 8x speed or slower DVD+RWs
- 6x speed or slower DVD-RWs (Ver.1.1. Ver.1.2 with CPRM*2)
- 16x speed or slower DVD+Rs
- 16x speed or slower DVD-Rs (Ver.2.0, Ver.2.1 with CPRM*2)
- 8x speed or slower DVD+R DL (Double Layer) Discs
-8x speed or slower DVD-R DL (Dual Layer) Discs (Ver.3.0 with CPRM*2)
So what is a 16x speed DVD-R (Ver.2.0, Ver.2.1) and when did the spec come out?
According to this document http://www.dvdfllc.co.jp/pdf/supple/rg_3.pdf
File system specs for Ver.2.1 = Sept 2002 (all x-speeds)
- Supplemental information added February 2007 (all x-speeds)
Physical specs for Ver.2.1 = April 2005 (all x-speeds)
with a Control Data Zone update in April 2006 (all x-speeds)
-16x speed revision 6.0 = September 2004
-8x speed revision 3.01 = April 2005
According to this document 8x media was slightly revised after 16x media's last revision.
According to my RDR-HX780 manual (as of April 2008) any Ver.2.0, Ver.2.1 16x DVD-R should work fine and fallback on burn speed since my firmware is newer than the last 16x disc revision and should have no problem reading the fallback strategy.
If you look at the latest TY 16x -R or the Verbatim azo 16x -R - both companies state that their newest discs comply with the above and will fallback to slower speeds.
Conforming to the Specification of "DVD-R for General" Version 2.1
and the Optional Specification of "16x-SPEED DVD-R" Revision 6.0
"DVD±R" design assure of writing to 16x
New dye for writing high speed is developed
Developed new dye is writing high speed, and resulted high density
write / read ( for 1x to 16x write)
I don't have the web link for the verbs right now but I just read my packaging and it indeed states Version 2.1 discs.
So please if you guys are going to make statements that my stand-alone firmware is older than the current Verbatim 16x discs or the current TY 16x discs and say that my deck has no strategy to calibrate itself falling back on the speed using these discs and will go nuts and burn its laser up, please back it up with some verifiable info.