It's hard[er] to help without knowing the OS involved. 2.24.00.64:[URL] Before updating the driver though, you should have updated: BIOS:[URL] ESM:[URL] After updating the PERC driver, you should update the firmware:[URL] 
PowerEdge 840 PERC 5/I OpenManage 6.5   OpenManage reports driver is out of date Driver Version                                2.13.00.64 Minimum Required Driver Version 2.24.00.64  Support page for this service tag does not contain a PERC 5/I driver download Where can I download this?
PE840 PERC5/I latest driver