Replacing dead drives in ZRAID2

[Mark Felder]

First of all, you're testing on decade old SCSI hardware that probably  
hasn't seen any serious use on a newer FreeBSD install in a very, very  
long time.

Secondly, I'm confused about the concept of a "3 drive RAIDZ2". How is  
that even possible? Two drives have to be parity, so the last drive is...  
the entire dataset? Why aren't you just doing a 3-way mirror?

And finally yes, you can just yank drives in a ZFS array to simulate a  
failure. After reinsertion you have to manually add them back to the pool,  
but it certainly works.