> You need to rewrite/extend that to deal with the fact that ZFS doesn't use 
> vfstab 
> and instead express it in terms of ZFS import/export.

The problem (as I see it) is that ZFS import is (by default) implicit at 
startup, while UFS mount is (by default) only performed when explicitly 
requested.

ZFS export isn't very useful in a cluster failover case because if a system 
crashes, you don't get a chance to run it, and if you want to run it after a 
crash (during startup), you can't use it until after the pool has been imported 
(and hence corrupted).

All of that said ...

It looks like 'zpool create -R' should solve the problem for anyone who is 
trying to build their own clustering facility, since it prevents the automatic 
import. Maybe we just need to document that more clearly? Calling it "alternate 
root" doesn't really draw attention to it.
 
 
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