Windows Virtualbox shared directory to modify the file permissions

Directly on the operation of the picture, simple and clear

Why can not I edit file permissions?

root@boot2docker:~# mount -t vboxsf home /data -o rw,uid=1000,gid=50,mode=0755 root@boot2docker:~# cd /data/ root@boot2docker:/data# ls -al x -rw-rw-r-- 1 docker staff 0 Jul 31 10:29 x root@boot2docker:/data# chmod 777 x root@boot2docker:/data# ls -al x -rw-rw-r-- 1 docker staff 0 Jul 31 10:29 x root@boot2docker:/data# chown root.root x root@boot2docker:/data# ls -al x -rw-rw-r-- 1 docker staff 0 Jul 31 10:29 x root@boot2docker:/data# chown root.root x root@boot2docker:/data# echo $? 0 root@boot2docker:/data# ls -al x -rw-rw-r-- 1 docker staff 0 Jul 31 10:29 x root@boot2docker:/data# 

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