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super1: support superblocks up to 4K.
authorNeilBrown <neilb@suse.de>
Thu, 8 Mar 2012 04:40:52 +0000 (15:40 +1100)
committerNeilBrown <neilb@suse.de>
Thu, 8 Mar 2012 04:40:52 +0000 (15:40 +1100)
commit911cead7f1948a560c58c97980b849226d858a75
tree5301b8827c07e44eeb9209784f4be6ee0b576c54tree | snapshot
parent52f07f57195229809c7b6d71ca81d2182d303058commit | diff
super1: support superblocks up to 4K.

The current 1024 byte limit on 1.x superblocks limits us to
384 devices.  Sometimes people want more.

The kernel is already prepared for superblocks up to 4K,
so enable that in mdadm  allowing up to
   (4096-256)/2 == 1920
devices (active plus spare).

Signed-off-by: NeilBrown <neilb@suse.de>
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