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authorNeilBrown <neilb@suse.de>2006-01-06 00:20:47 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:34:08 -0800
commit3b34380ae8c5df6debd85183c7fa1ac05f79b7d2 (patch)
tree9979f8b402b0566db286081eb7f5c26418964348 /Documentation/md.txt
parent03c902e17f40cfed63cd2494616f35fc9c58571b (diff)
[PATCH] md: allow chunk_size to be settable through sysfs
... only before array is started of course. 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>
Diffstat (limited to 'Documentation/md.txt')
-rw-r--r--Documentation/md.txt8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt
index 1dd0fb6021c..9710138d101 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -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