@@ -289,8 +289,8 @@ pinpoint exactly which data has been lost when a disk error occurs.
.IP
By default,
.B mkfs.xfs
-will not create reverse mapping btrees. This feature is only available
-for filesystems created with the (default)
+will create reverse mapping btrees when possible.
+This feature is only available for filesystems created with the (default)
.B \-m crc=1
option set. When the option
.B \-m crc=0
@@ -4134,7 +4134,7 @@ main(
.dirftype = true,
.finobt = true,
.spinodes = true,
- .rmapbt = false,
+ .rmapbt = true,
.reflink = true,
.inobtcnt = true,
.parent_pointers = false,