Docker doesn't save data in host mounted volume
<p>I'm trying to start jenkins in a docker container using Docker Toolbox on Windows 7.</p>

<p>I run </p>

<pre><code>docker run --name jenkins -p 8080:8080 -p 50000:50000 -v "//C/Users/myname/.jenkins:/var/jenkins_home" jenkins  
</code></pre>

<p>The jenkins starts up nicely, however there is nothing created under C:/Users/myname/.jenkins. 
I've created the folder but it stays empty.</p>

<p>When I now stop and remove the container and start it again, jenkins has lost everything I've done before.</p>

<p>What am I doing wrong?</p>