md: register new md sysfs file 'uuid' read-only

[linux-2.6-microblaze.git] / Documentation / admin-guide / md.rst

diff --git a/Documentation/admin-guide/md.rst b/Documentation/admin-guide/md.rst
index d973d46..cc8781b 100644 (file)
--- a/Documentation/admin-guide/md.rst
+++ b/Documentation/admin-guide/md.rst
@@ -426,6 +426,10 @@ All md devices contain:
      The accepted values when writing to this file are ``ppl`` and ``resync``,
      used to enable and disable PPL.
 
+  uuid
+     This indicates the UUID of the array in the following format:
+     xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+
 
 As component devices are added to an md array, they appear in the ``md``
 directory as new directories named::