我無論是nero或是DVDInfo都顯示Booktype +R

以下是DVDinfo Pro資訊.
Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID RICOHJPNR01
Format Capacity 4.05GB(4.35GB)
Book Type DVD+R
Media Type DVD+R
Media Id Code Speed 4.0x 5540KBps
Data area starting sector 30000h
Data area end sector 20611Fh
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1

我的+R有支援Booktype嗎?

Book Type這一向應該顯示DVD+R 還是DVD-R還是....
才是正確的