With btrfs, we can't really put the log on a separate device. What we
can do however is mirror the metadata across two devices and put the
data on a single device. When we turn on dmerror then the metadata can
fall back to using the other mirror while the data errors out.
Signed-off-by: Jeff Layton <jlay...@redhat.com>
---
common/rc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/common/rc b/common/rc
index 8b815d9c8c33..2084c1f24f30 100644
--- a/common/rc
+++ b/common/rc
@@ -829,6 +829,8 @@ _scratch_mkfs()
;;
btrfs)
mkfs_cmd="$MKFS_BTRFS_PROG"
+ [ "$USE_EXTERNAL" = yes -a ! -z "$SCRATCH_LOGDEV" ] && \
+ mkfs_cmd="$mkfs_cmd -d single -m raid1 $SCRATCH_LOGDEV"
mkfs_filter="cat"
;;
ext2|ext3)
--
2.9.3
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