The answer to this is that only when TWO or more partitions are in the pool the "extra copies" options show up.no extra copy option available under share tab in HDA dashboard
The drive pool tab appeared but much to my dismay the option for extra copies has not appeared in the shares tab. any help with this matter would be greatly appreciated.
Also, this option, when it is available, is located in the Setup > Drive Pooling > Shares area.