You can use the Specify settings panel of the Volume performance advisor wizard to identify your requirements for host attachment and the total amount of space that you need. You can also use this panel to specify volume number and size constraints, if any.
The Volume performance advisor wizard is a multiple panel task that you perform to determine where new volumes should be created for the best performance. The Specify settings panel is the first of these panels.
IBM Director Task pane --> Multiple Device Manager --> Manage performance --> Volume performance advisor --> Volume performance advisor wizard --> Specify settings panel