[App_rpt-users] Loading CENTOS Error Mounting Device Message

I am attempting to install CENTOS on a 2.5" 44 pin IDE hard drive attached to an HP T5740e Thin Client. I have tried several different size HD but keep getting the same error message: "Error mounting device sda1 as /: Invalid argument" "This most likely means this partition has not been formatted." "Press OK to reboot your system" Same Thin Client will load CENTOS to a 44 pin 4GB Flash Drive or a SATA drive with no problems. Any help greatly appreciated! Thanks, Chris K7AZ 29275