一张700MB的光盘要装进去697MB的内容一般情况下都不可以，除非用超刻。
不过linux下的图形刻录软件好像都没办法实现超刻。
只好用最原始的命令行来搞定。
cdrecord -overburn -dev /dev/hdc /home/****/******.iso
[刻录命令] [超刻选项] [不明] [刻录设备] [要刻录文件的位置]
man cdrecord
-overburn
Allow cdrecord to write more than the official size of a medium.
This feature is usually called overburning and depends on the
fact that most blank media may hold more space than the official
size. As the official size of the lead-out area on the disk is
90 seconds (6750 sectors) and a disk usually works if there are
at least 150 sectors of lead out, all media may be overburned by
at least 88 seconds (6600 sectors). Most CD recorders only do
overburning in SAO or RAW mode. Known exceptions are TEAC CD-
R50S, TEAC CD-R55S and the Panasonic CW-7502. Some drives do
not allow to overburn as much as you might like and limit the
size of a CD to e.g. 76 minutes. This problem may be circum-\r
vented by writing the CD in RAW mode because this way the drive
has no chance to find the size before starting to burn. There
is no guarantee that your drive supports overburning at all.
Make a test to check if your drive implements the feature.
