On Wed, 12 Mar 2014 13:45:31 +0100 David Brown <david.brown@xxxxxxxxxxxx> wrote: > So for raid1, you would add a new mirror device, making a 3-way mirror > instead of a 2-way one (I don't know off-hand if md raid allows this > re-shape). It sure does. raid1 can be 1-way, 2-way, 3-way, 4-way ..... and "mdadm --grow" can easily switch between them. NeilBrown
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