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authorNeilBrown <neilb@suse.de>2009-03-30 23:39:38 -0400
committerNeilBrown <neilb@suse.de>2009-03-30 23:39:38 -0400
commit99c0fb5f92828ae96909d390f2df137b89093b37 (patch)
tree67757972da005990d619b810c3b75fb8b6c9969f /drivers/atm
parent911d4ee8536d89ea8a6cd3e96b1c95a3ebc5ea66 (diff)
md/raid5: Add support for new layouts for raid5 and raid6.
DDF uses different layouts for P and Q blocks than current md/raid6 so add those that are missing. Also add support for RAID6 layouts that are identical to various raid5 layouts with the simple addition of one device to hold all of the 'Q' blocks. Finally add 'raid5' layouts to match raid4. These last to will allow online level conversion. Note that this does not provide correct support for DDF/raid6 yet as the order in which data blocks are summed to produce the Q block is significant and different between current md code and DDF requirements. Signed-off-by: NeilBrown <neilb@suse.de>
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