Dell HBA and iDRAC storage info

I have a FX2s chassis loaded with four FC630 blades, one of which has two Dell 12Gbps HBAs in the PCIe slots for connectivity to external storage enclosures. I've noticed that in the iDRAC, when I navigate to 'Storage > Controllers', I see the two HBAs (Dell 12Gbps HBA (PCI Slot x)) as well as the PERC H730 Mini, which is in HBA mode. If I go to 'Physical Disks', I only see the one disk that's attached to the H730.

If I go into the BIOS, however, I can navigate to 'Device Settings', where I can see the H730 as well as the two HBAs, and if I select an HBA, then go to 'Controller Management', then 'View Controller Properties', I can see the disk count, or if I go to 'View Physical Disk Properties', I can view information on all of the disks, and if I go to 'Select Physical Disk Operations', I can start a locate/blink, which works fine despite the fact that the enclosure has a Supermicro backplane, not a Dell backplane.

So since I can do all of this from the 'BIOS', any ideas why this information isn't available in the iDRAC?