Hi
I have a couple of questions
I currently have a 4disk RaidZ1 setup and want to move to a RaidZ2
4x2TB = RaidZ1 (tank)
My current plan is to setup
8x1.5TB  in a RAIDZ2 and migrate the data from the tank vdev over. 
What's the best way to accomplish this with minimal disruption?
I have seen the zfs send / receive commands which seem to be what I should be 
using? 
The reason I'm not doing a simple copy is I have Xen Volumes as well which I'm 
not exactly sure how to copy over.
ZFS list (snipping the rpool) yields
tank
tank/vm
tank/vm/centos48
tank/vm/centos48/disk0
tank/vm/centos54
tank/vm/centos54/disk0

Basically I'm looking to replace a 4disk Raidz1 with an 8disk raidz2 (from what 
I understand I can't simply add 4 more disks to the existing raidz1 and update 
it to raidz2)
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