DellPowerEdge T310 Technical Guide 69Can user programs oroperating system write data toit during normal operation?Purpose?2.5” Backplane or 3.5" BackplaneStorage ControllerProcessor No Backplane firmware (HDD status, etc.)Control PanelInternal USBYes as allowed by OSNormal usage is read only software license key, but notlimitedInternal SDModule Yes as allowed by OS Normal usage is embedded hypervisor OS but not limited.Power SupplyPSUMicrocontroller NoPower supply operation, power telemetry data, and faultbehaviorsiDRAC6EnterprisevFlash Yes when enabled, installed,and the media does not havethe write-protect switchapplied Storage of logs, user images like files, drivers, OS's, etc.Table 33. Methodology for Data Input to MemoryHow is data input to this memory?PlanarSystem BIOS SPIFlash Loading flash memory requires a vendor-provided firmware file and loader program whichis executed by booting up the system from a floppy or OS-based executable containingthe firmware file and the loader. A system loaded with arbitrary data in firmware memorywill not operate.LOM ConfigurationDataLoading flash memory requires a vendor-provided firmware file and loader program whichis executed by booting up the system from a floppy or OS-based executable containingthe firmware file and the loader. LOMs loaded with arbitrary data in firmware memorywould not operate.iDRAC6 ControllerROM N/AiDRAC6 controllerRAM iDRAC embedded systemSystem CPLD Loading flash memory requires a vendor provided firmware file and loader program whichis executed by booting up the system from a floppy or OS based executable (currentlyonly DRMK utility support) containing the firmware file and the loader. System loaded witharbitrary data in CPLD memory would not operate.System CPLD Not used