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[PATCH] md: allow chunk_size to be settable through sysfs

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... only before array is started of course.

Signed-off-by: Neil Brown <[email protected]>
Acked-by: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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NeilBrown 2006-01-06 00:20:47 -08:00 • committed by Linus Torvalds
commit 3b34380ae8
2 changed files with 34 additions and 0 deletions
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8
Documentation/md.txt
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@ -166,6 +166,14 @@ All md devices contain:
will be empty. If an array is being resized (not currently
possible) this will contain the larger of the old and new sizes.
chunk_size
This is the size if bytes for 'chunks' and is only relevant to
raid levels that involve striping (1,4,5,6,10). The address space
of the array is conceptually divided into chunks and consecutive
chunks are striped onto neighbouring devices.
The size should be atleast PAGE_SIZE (4k) and should be a power
of 2. This can only be set while assembling an array
As component devices are added to an md array, they appear in the 'md'
directory as new directories named
dev-XXX