Operating System: Microsoft Windows Server 2008 (64-bit)
Server: HP Proliant DL380 G7

My two hard drives are not working (total 5 are setup with Array Config.). These are primary two. Remaining 3 hard drives are working.
I want to know "Can I install OS after removing the affected Drives and replacing by remaining 3 drives?"

Note: In my city at now its not possible to get fresh Hard Drives for DL380 easily.