Kernel panic after removing SW RAID1 partitions, setting up ZFS.

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System is CentOS 6 all up to date, previously had two drives in MD RAID 
configuration. 

md0: sda1/sdb1, 20 GB, OS / Partition
md1: sda2/sdb2, 1 TB, data mounted as /home 

Installed kmod ZFS via yum, reboot, zpool works fine. Backed up the /home data 
2x, then stopped the sd[ab]2 partition with: 

mdadm --stop /dev/md1; 
mdadm --zero-superblock /dev/sd[ab]1; 

Removed /home in /etc/fstab. Used fdisk to set the partition type to gpt for 
sda2 and sdb2, then built *then destroyed* a ZFS mirror pool using the two 
partitions. 

Now the system won't boot, has a kernel panic. I'm remote, so I'll be going in 
tomorrow to see what's up. My assumption is that it has something to do with 
mdadm/RAID not being "fully removed". 

Any idea what I might have missed? 

Here's a screenshot of the panic
http://effortlessis.com/images/IMG_0705.JPG


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