But the Dual layer -R drives is at least 6 months to 1 year away for volume production according to Pioneer.
My Dual layer drive will only burn dual layer +R, but will burn single layer in + or -
As there is no -R dual layer media in existence this makes sense
By the time -R dual layer comes out, I think it will be dead in the water, it is just too long a wait, the proposed burn speed is slower than the current Dual +R models, (Let alone what will be available in 6 months) and you would expect that the media will be in mass production for +R for a long time b4 the -R drive is released, so the media will be cheaper on the + format.
With this much head start, I can't see -R dual layer getting much traction, unless the Dual +R turns out to be really incompatible with players. Every player we have tried (about 9 players including the xbox and momitsu) works with the Dual +R Sony media we have.
There has been no widespread testing of the dual layer formats to see which is more compatible, just because your player will currently play 'only' minus R single layer discs doesn't mean it will play dual layer -R, or that it won't play Dual +R.
I have a player that won't play -R discs of any type, but will happily play +RW so go figure.
Its all speculation, but that's how I reckon it will go.