Home > Storage > PowerScale (Isilon) > Product Documentation > Storage (general) > PowerScale All-Flash F210, F710 & F910 > Overview
Existing clusters in the field may add the F210, F710, and F910 nodes for additional capacity and performance. A minimum of 3 nodes is required to create a new node pool for the F210, F710, and F910.
Clusters that have F600s are not node pool compatible with the F710, requiring a separate node pool for the F710 with a minimum of 3 nodes. Clusters that have F900s are node pool compatible with the F900.
However, for clusters that have F200s, they have the option to increase the same node pool by adding a single F210. In this case, the only supported drive is the short formatted 1.92 TB option, resulting in a 960 GB capacity per drive. While the F210 is node pool compatible with the F200, a performance degradation is experienced where the F210 is not at full performance. When an F210 is added to the F200 node pool, the WebUI explains the soft restriction in the following image.
A similar soft restriction message is displayed in the CLI, as displayed in the following image.