You can use System Manager to add storage pools or dedicated SSDs to provision cache by converting an existing non-root HDD aggregate or a root aggregate that does not contain partitioned disks to a Flash Pool aggregate.
If the cluster is in a mixed-version state, you can use the command-line interface to create a Flash Pool aggregate and then provision SSD cache.
You must be aware of platform-specific and workload-specific best practices for Flash Pool aggregate SSD tier size and configuration.
The cache disks are added to the selected aggregate.