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authorNeilBrown <neilb@suse.de>2006-01-06 00:21:16 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:34:10 -0800
commit6d7ff7380b2e28c2807da3bf9fa614d91d15bacf (patch)
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parent83303b613d00718b07ec0a4dee7c99aa66629d96 (diff)
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[PATCH] md: support adding new devices to md arrays via sysfs
Writing major:minor to md/new_dev will bind that device to the array. 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>
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diff --git a/Documentation/md.txt b/Documentation/md.txt
index 7b3d471bb9f0..b8d172b254f7 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -200,6 +200,14 @@ All md devices contain:
This can be written only while the array is being assembled, not
after it is started.
+ 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
+ This will cause that device to be attached to the array, if it is
+ available. It will then appear at md/dev-XXX (depending on the
+ name of the device) and further configuration is then possible.
+
+
As component devices are added to an md array, they appear in the 'md'
directory as new directories named
dev-XXX