SAS ports on HP D3700

Hi , I am about to order an HP D3700 (QW967A) storage enclousure ,

now I wonder ;

- how many SAS controller does it has ?

- how many host interface does it have ?

please I need the acurate number of ports that it has and how can I add controllers ?

Thanks .

P.S. This thread has been moved from General to Disk array. - Hp Forum moderator