I'm trying to upgrade Chromium OS to Chrome OS with http://goo.gl/4suhf. Unfortunately, when running this script (inside Chromium OS), it says:
wget stuff
unpacking zipfile
RootFS Start: 286720 RootFS Size: 2359520
mount: special device /dev/sda12 does not exist
After that the script ends. I don't have a /dev/sda12, I just dd'd the Vanilla build to my hard drive. If you're interested in solving this, please review the code at goo.gl/4suhf. I did that myself but I'm not that good in analysing code! I've made up that the RootFS things are at the end of the file. Following this guide: http://zzsethzz.blogspot.be/2013/02/install-chromium-upgrade-it-to-chrome.html