Hi all,
until the scrub problem (http://bugs.opensolaris.org/view_bug.do?bug_id=6343667 
) is fixed,you should be able to "simulate" a scrub on the latest data  
by using
zfs send <snapshot> > /dev/null
Since the primary purpose is to verify latent bugs and to have zfs  
auto-correct them, simply reading all data would be sufficient to  
achieve the same purpose.
Problems:
1. This does not verify data from older snapshots and has to be issued  
for each FS in the pool.
2. It might be hard to schedule this task as comfortable as a scrub.

Resilvering should pose less of a problem as that only has to rewrite  
data of a single disk, i.e. you do not have to stop snapshots for a  
very long time. If a device was only temporarily unavailable,  
resilvering is actually much faster as only affected blocks will be re- 
written.
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