Is the backplane connected to the S110? Normally it would connect to a PERC H710. 
Hello, I recently purchased an R720 (hard drives removed) and ordered some 3.5" 1TB SATA drives for my server. I installed the drives as instructed in the manual, verified they were connected to the backplane, and there doesn't seem to even be any power getting to the drives, other than a brief flash of the green LED indicators at boot time. Do these SATA drives require a separate power connector or something? I'm fairly new at this so any help would be greatly appreciated. Thanks.
R720 Won't recognize HDDs