Yes, you can safely merge pools while the volumes are live.  Just a few things to verify first, to ensure you have a trouble free merge: In the pool that you are merging, you want to check the disk spin rate to ensure that members in the target pool have same RAID level as in the member(s) you are merging.  (Dell recommends that pool members with the same disk spin rate have the same RAID level).  Example, if a target pool contain a member that has 7200 RPM disks configured for RAID10, and one of the members in the merging pool has a 7200 RPM member configure for RAID50. Thin clones inherit the pool setting of the template volume. If you move the template volume to a different pool, the thin clones also move. -joe
Hello! I need to merge storage pools to allow for load balancing across members. Can I safely merge the pools whilst the volumes are being accessed (by ESXi and VMs)?
Merging Pools