I assume you have H330 controller as there is no H433 controller. Please confirm. You can either add Dedicated Hot Spare (Hot spare disk will be assigned to one of the two RAID only and hot spare become active only any single disk failure on that RAID array) or Global Hot Spate (Hot spare disk will be assigned to any of the RAID on the controller and hot spare become active when any single disk failure on that controller). You can choose between these.  You can assign hot spare to the controller using PERC BIOS Configuration utility, iDRAC or OMSA. Below link have details on the same. To configure storage using PERC BIOS configuration utility you need to reboot the server and to use OMSA you need to install open manage software on the server. You can try configuring storage using iDRAC which does not require any reboot or installing any application on the server. Below link have details on configuring hot spare using various methods.   iDRAC  Global Hot spare     Dedicated Hot spare [URL]    PERC BIOS Configuration utility Global Hot spare [URL]  Dedicated Hot spare [URL]  OMSA Global Hot spare [URL]  Dedicated Hot spare [URL] 
I'm testing a new T340 with 8 drive bays and a Perc H433 card. I've created a raid 1 array for OS and a raid 5 (with 4 1TB dives) for data.  I'd like to add a 5th 1TB drive as a hot spare, but I can not find a way to add it.  Can it be done and how?
Adding a hot spare to an existing array