Hi Johny, here is the method I just recently used to move vol0;
1. Disable the cluster: cf disable
2. Check the size of current vol0: vol size vol0
3. Create a new root volume on the SATA aggr: vol create vol0_new aggr0_sas <SIZE>
4. Copy the data to the new volume: ndmpcopy /vol/vol0 /vol/vol0_new
5. Rename the old root volume: vol rename vol0 vol0_old
6. Rename the new root volume: vol rename vol0_new vol0
7. Flag the new root volume as the root volume: vol options vol0 root
8. Reboot the controller: reboot
9. Confirm the SAS aggr now hosts the root vol0: aggr status on the left under Options it should say root on aggr0_sas
10. Offline and destroy the old volume vol0: vol offline vol0_old and vol destroy vol0_old
