Exminiman,     In order to use the H700 you would need to change the Sata Settings in the BIOS to AHCI, and under Integrated Devices the Intergrated Raid should be enabled. Now another thing I noticed, and what is likely the issue, is that when going from the software controller to the hardware, you have a difference in cables. Which is why you likely aren't seeing the drives. With an H700 installed you would need the cable, part # W846K (if hot plug drives) or Y690K (if cabled drives). Those are the controller to backplane cables. As far as removing the software controller, it isn't an option to do.   Let me know if this helps.    
HI Among other jobs I run our small network in our family run company We have an old T310 server (good condition) with 4 new SATA disks , which I would like to make use of as a file server / storage on a small network - rather than throw away. Will be running server 2016 standard, so I understand that I can not use the Infamous S100 PERC software RAID. So we have purchased an H700 PCI card to use instead [URL] This was just plugged into the PCI slot - no cables required apparently Disabled RAID in the BIOS SATA settings (another post refers) with the intention of managing RAID from OMSA after the OS had booted. Problem: If I disable RAID in BIOS then Disk are not recognised however,  if I enable  ATA in BIOS (rather than RAID or No RAID) I can boot to OS but OMSA does not see the disks, so cant create a RAID. Question (s) :  What are the settings I need to disable the S100 and enable the H700 allowing us to run RAID.  Is it possible to remove the S100 PERC - so it doesn't "elbow its way in" when you enable RAID in the BIOS Am I flogging a dead horse........ Cheers in advance      
T310 Server with S100 PERC onto Server 2016 Standard.