I have a dell R900 with a 2 drive ( 146Gb) mirrored configuration . One of the disks failed, I have a replacement on route , the replacement drive is a used drive . When I install into the new carrier , turn on the host , all PERC model controllers should detect and rebuild automatically , that is my understanding . My question is , will I need to initiate anything in the RAID setup screen or is this all seamless as the manual seems to elude to. Also, The replacement drive is seagate and the original is Dell , will this cause problems?