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[PATCH] md: allow md array component size to be accessed and set via sysfs

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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]>
This commit is contained in:
NeilBrown 2006-01-06 00:20:49 -08:00 • committed by Linus Torvalds
commit a35b0d695d
2 changed files with 98 additions and 42 deletions
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9
Documentation/md.txt
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@ -174,6 +174,15 @@ All md devices contain:
The size should be atleast PAGE_SIZE (4k) and should be a power
of 2. This can only be set while assembling an array
component_size
For arrays with data redundancy (i.e. not raid0, linear, faulty,
multipath), all components must be the same size - or at least
there must a size that they all provide space for. This is a key
part or the geometry of the array. It is measured in sectors
and can be read from here. Writing to this value may resize
the array if the personality supports it (raid1, raid5, raid6),
and if the component drives are large enough.
As component devices are added to an md array, they appear in the 'md'
directory as new directories named
dev-XXX