Dell POWEREDGE R720XD - Manual (Page 7)

Item Purpose? (e.g. boot code) How is data input to this memory?
FRU Card manufacturing information Programmed at ICT during production.
1-Wire EEPROM Holds default controller
properties/settings ROC writes data to this memory
SPD Memory configuration data Pre-programmed before assembly
SBR Bootloader Pre-programmed before assembly
SPI Flash FPGA configuration data Pre-programmed before assembly. Can
be updated using Dell/LSI tools
Flash Card firmware Pre-programmed before assembly. Can
be updated using Dell/LSI tools
ONFI Backup Flash Holds cache data during power loss FPGA backs up DDR data to this
device in case of a power failure
SDRAM Cache for HDD I/O ROC writes to this memory - using it as
cache for data IO to HDDs
H310, H310M PERCs
NVSRAM Configuration data ROC writes configuration data to
NVSRAM
FRU Card manufacturing information Programmed at ICT during production
1-Wire EEPROM Holds default controller
properties/settings ROC writes data to this memory
SBR Bootloader Pre-programmed before assembly
Flash Card firmware Pre-programmed before assembly. Can
be updated using Dell/LSI tools
PCIe SSD Extension Card
Switch Configuration
EEPROM Configuration for PLX PCIe switch,
setting registers The EEPROM image is pre-loaded at
factory before assembly. Once
assembled on the card, data can be
entered via PLX Device Editor or PLX
EEP DOS based tool.
IDSDM
SPI Flash Exclusively used by the controller SPI interface via iDRAC
MCU Firmware USB interface via PCH