Why is the directory mounted through docker -v and empty in the container?

  docker, question

Dokerfile is a word:

FROM  daocloud.io/library/debian

Image generated later:

docker build -t debian .

Start:

docker run -v /f/test/:/test/ -it debian /bin/bash

After startup, using ls to view the directory is empty:

root@fa88436e75b5:/ ls -la /test
 total 4
 drwxr-xr-x  2 root root   40 Jul 24 09:12 .
 drwxr-xr-x 28 root root 4096 Jul 24 09:20   ..

The local directory has files:

$ ls -la /f/test/
 total 11
 DRWXR-XR-X1 Silly 19712100 July 24 17:11 ./
 DRWXR-XR-X1 Silly 197121 July 24 17:11 ../
 -rw-r-r-1 silly 197121 July 24 17:19 a
 -rw-r-r-1 silly 197121 15 July 24 17:20 b
 -rw-r-r-1 silly 197121 13 July 24 17:20 c

The system is win7, the novice is not very understand, ask for help

Ssh to the host, check the mount to know, you can virtualbox share the F disk