I need to get bus protocol(SAS/SATA etc.) using RACADM.

I tried racadm hwinventory and it’s working. It gives me all hardware inventory but what parameter I can use with it to get disks info? Like for example racadm hwinventory nic gives me the list of nics. Also I tried racadm raid get pdisks -o -p BusProtocol or just racadm storage get pdisks -o . It says “Please wait while raid config data is being fetched.” for 2 second and then “ERROR: Unable to perform requested operation”

Thank you for any comments!