制作启动盘报错 The erased disk did not mount.

u盘用磁盘工具“抹掉”为Mac OS扩展（日志式）格式之后，运行createinstallmedia命令报错The erased disk did not mount.

sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/Sur     
Ready to start.
To continue we need to erase the volume at /Volumes/Sur.
If you wish to continue type (Y) then press return: y
Erasing disk: 0%... 10%... 20%... 30%... 100%
The erased disk did not mount.