> Data newly written to the ten-disk RAIDz2 has a nominal storage efficiency of 80 percent—eight of every ten sectors are data—but the old expanded data is stil

> Data newly written to the ten-disk RAIDz2 has a nominal storage efficiency of 80 percent—eight of every ten sectors are data—but the old expanded data is still written in six-wide stripes, so it still has the old 67 percent storage efficiency. This makes this feature quite ‘meh’. The whole goal is capacity expansion and you won’t be able to use the new capacity unless you rewrite all existing data, as I understand it. This feature is mostly relevant for home enthusiasts and I think it doesn’t really bring the desired behavior this user group wants and needs. > Undergoing a live reshaping can be pretty painful, especially on nearly full arrays; it's entirely possible that such a task might require a week or more, with array performance limited to a quarter or less of normal the entire time. Not an issue for home users as they often don’t have large work loads thus this process is fast and convenient. Even if it would take two days.