I've just started playing around with btrfs RAID1, and I've noticed a couple of what seem to be UI issues. Suppose I do something like "mkfs.btrfs -d raid1 -m raid1 dev1 dev2". I see the following minor usability problems: - Unless I'm missing something, there doesn't seem to be any way later on to see that I set the data policy to raid1, except using btrfs-dump-tree and checking the flags bits for the appropriate group. Which can make things confusing if I have a bunch of btrfs filesystems around. - The free space reporting doesn't seem to take into account the fact that everything is going to be mirrored; so "df" et al report the size of the filesystem and free space on the new filesystem as size(dev1) + size(dev2) -- if dev1 and dev2 are the same size then I would assume it should really be just size(dev1) for a fully-RAID1 filesystem. (Not sure in general what we should say for a metadata-only mirrored filesystem, since we don't really know in advance how much space we have exactly) I'm happy to help fix these issues up; just want to make sure I'm not missing something or doing it wrong. Thanks, Roland -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
