[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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Linus Torvalds
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@ -200,6 +200,14 @@ All md devices contain:
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This can be written only while the array is being assembled, not
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after it is started.
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new_dev
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This file can be written but not read. The value written should
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be a block device number as major:minor. e.g. 8:0
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This will cause that device to be attached to the array, if it is
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available. It will then appear at md/dev-XXX (depending on the
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name of the device) and further configuration is then possible.
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As component devices are added to an md array, they appear in the 'md'
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directory as new directories named
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dev-XXX
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