That was really the nature of the bug, in that it exposed a system critical subvol. But of course you do have all powers of the system anyway so you will always be able to break stuff. The confusion here is that, on CentOS btrfs arrangement, there is a root subvol which contains the system, but there is also a root directory within linux systems “/root” that is the root users home. Those two elements were confused in the earlier code and provided for creating a subtle set of bugs. So I just removed it from the Web-UI as I believe it was initially a mistake that it emerged in the first place.
Yes, you would import them after the install. But best to pick you update channel and apply all updates before you do that though as then you get newer import code. The following may be of help for the reinstall process:
Reinstalling Rockstor: http://rockstor.com/docs/reinstall/reinstall.html
That fix was added after we had dropped the CentOS based testing channel development, so yes it only appeared in our Stable channel updates subscription service. But since we have now restarted the testing channel, but for our pending openSUSE based variant only, it is now in there also. See the following for the background on all of this:
Specifically the “Quick history” subsection.
Hope that helps.