Just make SURE the other host is actually truly DEAD!

If for some reason it's simply wedged, or you have lost console access but the 
hostA is still "live", then you can end up with 2 systems having access to same 
ZFS pool.

I have done this in test, 2 hosts accessing same pool, and the result is 
catastrophic pool corruption.

I use the simple method if I think hostA is dead, I call the operators and get 
them to pull the power cords out of it just to be certain.  Then I force import 
on hostB with certainty.
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