[PATCH] md: allow md/raid_disks to be settable
If array is active, try to reshape, else just set the value.
Signed-off-by: Neil Brown <neilb@suse.de>
Acked-by: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/Documentation/md.txt b/Documentation/md.txt
index a3eadf8..69f742d 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -165,6 +165,9 @@
in a fully functional array. If this is not yet known, the file
will be empty. If an array is being resized (not currently
possible) this will contain the larger of the old and new sizes.
+ Some raid level (RAID1) allow this value to be set while the
+ array is active. This will reconfigure the array. Otherwise
+ it can only be set while assembling an array.
chunk_size
This is the size if bytes for 'chunks' and is only relevant to