本來windows上傳到板子上的速度很慢
增加
socket options = TCP_NODELAY
明顯上傳下載速度都快了
參考：https://superuser.com/questions/713248/home-file-server-using-samba-slow-read-and-write-speed
https://www.samba.org/samba/docs/old/Samba3-HOWTO/speed.html