ID=5 is the default, "root" or "toplevel" subvolume which can't be deleted anyway (at least normally, I am not sure if some debug-magic can achieve that). I just checked this (out of curiosity) and all my Btrfs filesystems report something very similar to yours (I thought DELETED was a made up example but I see it was literal...):
~ # btrfs sub list -a / ID 303 gen 172881 top level 5 path <FS_TREE>/gentoo ~ # btrfs sub list -ad / ID 5 gen 172564 top level 0 path <FS_TREE>/DELETED I guess this entry is some placeholder, like a hidden "trash" directory on some filesystems. I don't think this means all Btrfs filesystems forever hold on to their last deleted subvolumes (and only one). -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html