Select the components you want to include in this hot spare pool.
All available components are listed at the top of the pane and the components you have selected show up at the bottom. Change your selection by selecting one or more components, then clicking the Add or Remove buttons to add or remove the components from the new hot spare pool you are creating. Be sure that the components you include in the hot spare pool are as large as or larger than the components they should replace in the event of a disk failure.