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-rw-r--r--Documentation/md.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt
index 4cf5972821a9..80f158745ca5 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -200,6 +200,11 @@ All md devices contain:
This can be written only while the array is being assembled, not
after it is started.
+ layout
+ The "layout" for the array for the particular level. This is
+ simply a number that is interpretted differently by different
+ levels. It can be written while assembling an array.
+
new_dev
This file can be written but not read. The value written should
be a block device number as major:minor. e.g. 8:0