Hello,   Since they two members aren't in the same pool, I would leave them as-is.   You can have up to four pools in one group.   When you add a member to a group, it has not RAID level assigned.  So therefore it has no space to provide the group.  It is assigned to the default group, but you can create a new pool and move it there first.   Then assign the RAID type.  Additionally, you can delay making the space available to the group as an option at create time.  This would give you time to move the member to a new pool.   Regards, Don 
I have a group with a PS6210xs and a PS6210x. The x is in the default pool, and the xs is in a different pool. Together, they hold more 26 TB of data, so neither member can hold data all by itself. We also have a new 6210x that I am getting ready to join. I'm hoping to join the new array to the group but not have any data move to it at first, so I have a few questions. Can the 6210x and 6210xs be in the same pool (setting aside the space issue for a moment)? The hybrid runs raid 6 accelerated, and the other just runs raid 6. If they can be in one pool, is there any downside in terms of performance? Coming back to the space issue, and before we join the new array, is it possible to move the 6210x from the default pool to the other pool if the member of the other pool doesn't have enough free space all by itself? If I can't do that, is it possible to join the new array to the group, but move it to a brand new pool before it starts automatically getting data from the other default pool member? Thanks.
Moving member from default pool