Are the units running different raid types? If so, you can use the option for the raid preference on each volume to set a raid preference for a volume.
Hello, We have a 3 member array setup where they are all part of the default storage pool.  Is it possible to control the volume distribution among the members?   Specifically, I want it so it only 2 of the volumes (out of 10) can use 1 of the members.  (We have a member that is all SSD.)  We originally had it in a separate storage pool but we didn't have enough space for replication to take place.  Now we have some of the Volumes that are used for file servers taking up valuable SSD space. Thanks!
Controlling Volume Distribution