title: (re)mounting the SD card on android emulator
body: <p>On the emulator, I can unmount the SD card from the Settings.</p>
  
  <p>I can then mount it on my OS, then unmount it normally.</p>
  
  <p>I haven't been able to figure out how to re-mount it then on the emulator (without rebooting it).</p>
  
  <p>hints:</p>
  
  <ul>
  <li>the <code>adb</code> command <code>remount</code> is unrelated: it's about <code>/system</code></li>
  <li>the <code>emulator</code> command is unrelated: it's only about starting the emulator</li>
  <li>mounting the SD card in two places of course messing everything up (I tried)</li>
  </ul>
  
  <p>more:</p>
  
  <ul>
  <li><p><code>mount</code> outputs the following:</p>
  
  <p><code>/dev/block//vold/179:0 /sdcard vfat rw,dirsync,nosuid,nodev,noexec,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0</code></p></li>
  <li><p>trying to mount again from the shell after unmounting it, using the same options as above, gives a segfault</p></li>
  <li>no idea why the double slash in <code>block//vold</code>, I guess it's just a typo</li>
  </ul>