This is interesting, because on MY mac mini under system profiler it  
reads:

Matshita DVD-R UJ-845C:

Firmware Revision: 			DPP9
Interconnect: 				ATAPI
Burn Support:				Yes (Apple Shipped/Supported)
Cache:	 					2048k
Reads DVD:					Yes
CD-Write:					-R, -RW
DVD-Write:					-R, -RW, +R, +RW
Burn Underrun Protection CD:	Yes
Burn Underrun Protection DVD:Yes
Write Strategies:				CD-TAO, CD-SAO, DVD-DAO

Can you tell me what version of the firmware yours has? I am starting  
to believe that maybe what I heard was true and that Apple crippled  
the firmware in some of these?

Regards,

Greg

On Jan 30, 2006, at 12:32 AM, John Klos wrote:

>> Just wondering if anyone knows for sure if the "Superdrive" in the  
>> Mac Mini is dual-layer capable? It is a Matshita UJ-845C.  I  
>> looked all over the internet and found many references to the same  
>> model # (UJ-845C) in other computers from other Manufacturers as  
>> well as other versions(?) (845B/845D/845S, etc.) and all of them  
>> are dual-layer capable.  I also found another reference to the  
>> 845C being dual-layer with a different firmware version than the  
>> one that came on the mini.
>
> System Profiler. On my Mac mini, one of the lines under "Disc  
> Burning" for the Matshita UJ-845 is:
>
>   DVD-Write:	-R, -RW, +R, +RW, +R DL
>
> The "+R DL" means it can burn DVD+R dual layer. Minis are cool.
>
> John Klos