Hi John, Glad you have made progress on this observation. After initiating consistency check on H310 controller, make sure system is booted to host OS. After booting to host OS only, all the background operations start running by utilizing host memory in case of H310 controller.  If controller (H310) is not booted to host OS, no background operation can be progressed from Pre boot environment.
I have a T320 with iDRAC Enterprise, PERC H310 and a RAID-1 array.  I go to Virtual Disks, and add a Consistency Check to the array's Pending Operations queue.  Then I go to Pending Operations to try to force the start of the operation, and it appears that I have to reboot to invoke the operation?  I cannot believe that.  Do I have to do this from the command line with racadm or (?) to invoke an immediate consistency check?  Thanks for any help.
Background RAID Consistency Check without Reboot?