If you haven't changed the cable then that is the problem. The S110 has a different connector than the PERC. [IMAGE] In the diagram #24 is the S110 connector you are currently using. #22 is the PERC connector that you need to use now. Here are the part numbers for the cable: If you have the 2.5" HDD backplane - MJCP4 If you have the 3.5" HDD backplane - MX3P7
I cannot for the life of me get the controller to detect any physical drives. They are Dell branded drives. Any ideas of particular BIOS settings I may need to change? The box was originally set up RAID 10 on the S110 raid but I deleted that and tried with the software raid both disabled and enabled and still no luck. Didn't see anything that would indicate a firmware issue but:  PERC H710  v21.0.2-0001 BIOS v1.2.6  Thanks!
PowerEdge R720 and PERC H710