Dell PowerEdge R910 Technical Manual

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DellDell PowerEdge R910 Technical Guide 51Appendix A. VolatilityThe Dell™ PowerEdge™ R910 contains both volatile and non-volatile (NV) components. Volatilecomponents lose their data immediately upon removal of power from the component. Non-volatilecomponents continue to retain their data even after the power has been removed from thecomponent. Components chosen as user-definable configuration options (those not soldered to themotherboard) are not included in the Statement of Volatility. Configuration option information(pertinent to options such as microprocessors, system memory, remote access controllers, andstorage controllers) is available by component separately. The following NV components are presentin the PowerEdge R910 server.Table 19. Volatility InformationServer BIOS Memory (SPI Flash, IC)Size: 4 MBType [Flash PROM, EEPROM]: Flash EEPROM (Serial Peripheral Interface)Can user programs or operating system writedata to it during normal operation?NoDoes it retain data when powered off? YesPurpose? [boot code] Boot Code, Configuration Information, EUFIenvironmentHow is data input to this memory? Loading flash memory requires a vendor-provided firmware file and loader programwhich is executed by booting up the systemfrom a floppy or OS-based executable containingthe firmware file and the loader. System loadedwith arbitrary data in firmware memory will notoperate.How is this memory write protected? Software write protectedServer CMOS (Complementary Metal-Oxide Semiconductor) MemorySize: 512 BytesType [Flash PROM, EEPROM]: Battery-Backed NVRAMCan user programs or operating system writedata to it during normal operation?NoDoes it retain data when powered off? YesPurpose? [boot code] RTC and storing system configuration settingsHow is data input to this memory? F2 Setup Menu during POSTHow is this memory write protected? N/ARemarks Jumper on motherboard can be used to clear tofactory default settings.Removing CMOS battery will clear to factorydefaults settings as well.Server BMC (Baseboard Management Controller)/iDRAC Express Boot Block FlashSize: 2 MBType [Flash PROM, EEPROM]: Serial Flash