title: What is the contents of vold.fstab, or the syntax of the dev_mount line?
body: <p>I am trying to understand some posts on how to accomplish various pieces of sd card magic on Android.  These posts refer to /etc/vold.fstab and suggest modifying its contents with additional or changed dev_mount lines.</p>
  
  <p>Okay, interesting, I think. And I try googling vold.fstab and dev_mount to learn more about them. Oddly, these terms only seem to exist in various forum posts about how to do magical things with sd cards for Android.</p>
  
  <p>That is, I can't find any "official" man pages or documentation on what the vold.fstab file is supposed to contain, whether for instance it is a script, or a config file, whether dev_mount is a command or a specification, etc.</p>
  
  <p>So as a very n00b Android developer, </p>
  
  <ol>
  <li>Where is the official documentation or man pages on vold.fstab?</li>
  <li>Apart from developer.android.com, where should I look for comprehensive documentation on Android</li>
  </ol>