> >  3. burn in the raidset for at least one month before trusting the
> >     disks to not all fail simultaneously. 
> > 
> Has anyone ever seen this happen for real?  I seriously doubt it will
> happen 
> with new drives. 

I have seen it happen on my own home ZFS fileserver...
purchased two new 500gb drives (WD RE2 enterprise ones), both started failing 
within a few days.
Luckly I managed to get both replaced without loosing any data in my RAID-Z 
pool.
Looking at the drive serial numbers they were part of the same batch.

Aaron
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