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Hi! I recently tried to mount a filesystem in RAID1 mode using loopback devices. I followed the instructions at [1]. Here''s exactly what I''ve done: $ dd if=/dev/zero of=raid1_0.img bs=1M count=500 $ dd if=/dev/zero of=raid1_1.img bs=1M count=500 $ mkfs.btrfs -m raid1 -d raid1 raid1_0.img raid1_1.img $ losetup /dev/loop0 raid1_0.img $ losetup /dev/loop1 raid1_1.img $ mount -t

.... This patch adds a check in btrfs_open_devices() for the mount status of every device belonging to the filesystem. The function check_mount() gets improved support for loopback devices. It now detects if the program is run on the file that is being used by the loopback device. Signed-off-by: Andi Drebes <lists-receive@programmierforen.de> --- diff --git a/btrfs-map-logical.c b/btrfs-map-logical.c index a109c6a..1e0ef9f 100644 --- a/btrfs-map-logical.c +++ b/btrfs-map-logical.c @@ -169,7 +169,7 @@ int main(int ac, char **av) radix_tree_init(); cache_tree_init(&root_cache); - root =...