【不大】
Region information N/A not a DVD-VIDEO
Media code/Manufacturer ID CMC MAG. AE1
Format Capacity Blank Disc
Free Blocks 411107328
Free Capacity 4.38GB(4.71GB)
Book Type DVD-R
Media Type DVD-R
Manufacturer Rated Speed 8.0x 11080KBps
Available Write Descriptor CLV 12.0x 16620KBps
Available Write Descriptor CLV 8.0x 11080KBps
Available Write Descriptor CLV 6.0x 8310KBps
Available Write Descriptor CLV 4.0x 5540KBps
Write Strategy Speed 4.0x 5540KBps
2x Speed OPC beta 09
2x Speed OPC power 0D
2x Write Strategy field 1 11 87 78 90
2x Write Strategy field 2 88 80 00 00 00 00
4x Speed OPC beta 05
4x Speed OPC power 15
4x Write Strategy field 1 0D 0F 0A 09
4x Write Strategy field 2 97 07 0F 0B
4x Write Strategy field 3 80 00 00 00
4x Speed OPC beta multi-pulse 05
4x Speed OPC power multi-pulse 1B
4x Write Strategy field 4 13 A8 89 65
4x Write Strategy field 5 B6 89 88 80 00 00
4x Write Strategy field 6 00 00 D0 00 00
Data area starting sector 30000h
Linear Density 0.267um/bit
Track Density 0.74um/track
Number of Layers 1
Complete Media Code
00000000 00 6C 00 00 01 40 C1 FD 9E D8 52 00 02 54 0D 0E .l...@....R..T..
00000010 88 9A 80 00 03 43 4D 43 20 4D 41 00 04 47 2E 20 .....CMC MA..G.
00000020 41 45 31 00 05 00 00 00 00 00 02 00 06 09 0D 11 AE1.............
这是用工具实测的数据，标称有4.71G实为4.38G的可用数据空间。
换算得到的MB为4.38*1024=4485.12MB<4500MB，加上刻录软件的安去措施，如不用超刻是会出现空间不足的提示的。