We had a brief look to see how CentOS dealt with the problem, and they seem to probe /dev/sda, and if it returns an error, they remove usb-storage, rescan for devices, and reprobe /dev/sda (which is now a real hard drive instead of a vacant card-reader slot).
We had a brief look to see how CentOS dealt with the problem, and they seem to probe /dev/sda, and if it returns an error, they remove usb-storage, rescan for devices, and reprobe /dev/sda (which is now a real hard drive instead of a vacant card-reader slot).