title: about android emulator diskimage
body: <blockquote>
  <p>The emulator provides a default user-data disk image. At startup, the emulator creates <em><strong>the default image</strong></em> as a copy of <em><strong>the system user-data image</strong></em> (user-data.img), described above. The emulator stores the new image with the files of the active AVD.</p>
  </blockquote>
  <p>from:<a href="http://androidappdocs.appspot.com/guide/developing/tools/emulator.html" rel="nofollow noreferrer">http://androidappdocs.appspot.com/guide/developing/tools/emulator.html</a></p>
  <p>1)What does the default images mean?(userdata.img?)<br>
  2)What does the system user-data image mean?(userdata-qemu.img?)</p>