I made a really stupid mistake... having trouble removing a hot spare 
marked as failed I was trying several ways to put it back in a good 
state.  One means I tried was to 'zpool add pool c5t3d0'... but I forgot 
to use the proper syntax "zpool add pool spare c5t3d0".

Now I'm in a bind.  I've got 4 large raidz2's and now this punty 500GB 
drive in the config:

...
          raidz2    ONLINE       0     0     0
            c5t7d0  ONLINE       0     0     0
            c5t2d0  ONLINE       0     0     0
            c7t7d0  ONLINE       0     0     0
            c6t7d0  ONLINE       0     0     0
            c1t7d0  ONLINE       0     0     0
            c0t7d0  ONLINE       0     0     0
            c4t3d0  ONLINE       0     0     0
            c7t3d0  ONLINE       0     0     0
            c6t3d0  ONLINE       0     0     0
            c1t3d0  ONLINE       0     0     0
            c0t3d0  ONLINE       0     0     0
          c5t3d0    ONLINE       0     0     0
        spares
          c5t3d0    FAULTED   corrupted data
          c4t7d0    AVAIL  
...



Detach and Remove won't work.  Does anyone know of a way to get that 
c5t3d0 out of the data configuration and back to hot-spare where it belongs?

However if I understand the layout properly, this should not have an 
adverse impact on my existing configuration.... I think.  If I can't 
dump it, what happens when that disk fills up?

I can't believe I made such a bone headed mistake.  This is one of those 
times when a "Are you sure you...?" would be helpful. :(

benr.
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