From: NeilBrown <neilb@suse.de>
Date: Mon, 26 Jun 2006 07:27:41 +0000 (-0700)
Subject: [PATCH] md: support stripe/offset mode in raid10
X-Git-Tag: v2.6.18-rc1~640
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c93983bf517c100a31e40ef087e19bd3d7aa2d28;p=pandora-kernel.git

[PATCH] md: support stripe/offset mode in raid10

The "industry standard" DDF format allows for a stripe/offset layout where
data is duplicated on different stripes.  e.g.

  A  B  C  D
  D  A  B  C
  E  F  G  H
  H  E  F  G

(columns are drives, rows are stripes, LETTERS are chunks of data).

This is similar to raid10's 'far' mode, but not quite the same.  So enhance
'far' mode with a 'far/offset' option which follows the layout of DDFs
stripe/offset.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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