That presumes you're using LVM partitions in the first place. I've generally found those to be a level of fussery that's sufficiently 1) advanced and 2) rarely exercised that I prefer _not_ dealing with them. Easier to either rely on a package management system which doesn't betray you (among the reasons I tend to like Debian and its derivatives -- and no, I haven't played with Arch or its PM, though the OP clearly is), or set up a specific test account for such things.