You can find it just by looking in your log file (see examples):
Burner firmware is responsable for how good it recognizes the in the burner placed media . (finding the matching write strategy in the internal list)04/10/2007 18:35:35 info New Drive selected : 1:0:0 - _NEC DVD_RW ND-2500A 1.06 [D] (Ide)
10/2/2007 3:30:27 PM info New Drive selected : 0:0:0 - _NEC DVD+-RW ND-6650A 1.23 [D] (Ide)
9/10/2007 7:38:02 PM info New Drive selected : 1:0:0 - TSSTcorp CD/DVDW TS-H552U US06 [E] (Ide)
If you use newer type discs as at the moment of your burner got produced, they are probably not be included in the list.
They could get added by installing newer firmware (if the update did contain that).
Here's a real good place to search for burner firmware: