Reference Guide

Dell - Internal Use - Confidential
Item
Type (e.g. Flash PROM,
EEPROM)
Can user programs or
operating system write
data to it during normal
operation?
Purpose? (e.g. boot code)
SPI Flash
SPI Flash
No
EasyRestore functionality
contains Service Tag, Copy of
SEL logs
IDSDM
iDSDM (uSD1, uSD2)
NAND Flash
Yes
Provides mass storage
SPI Flash
SPI Flash
SPI flash is only indirectly
connected to iDRAC.
iDRAC can read any
address in the SPI flash,
but may only write the
primary firmware
storage area as a part of
a firmware update
procedure.
Boot firmware storage,
configuration and state data for
IDSDM.
BOSS
SPI FLASH
FLASH EEPROM
No
Boot code, FW
FRU
FLASH EEPROM
No
Card manufacturing
information
LCD Bezel
Microcontroller
Internal Flash
No
bootloader and s/w
implementation of LCD
command set
PSU
MCU
Internal Flash
Yes
Boot code, FW
FRU
EEPROM
No
PSU information
LOM
SPI FLASH
SPI Flash EEPROM
Yes
Firmware
R1A/R1D-paddle/R2A/R2B/R3A/R4D
MCU
Flash ROM
No
Riser information
STD/LC RIO
MCU
Flash ROM
No
Rear IO information
Item
How is data input to this
memory?
How is this memory write
protected?
How is the memory
cleared?
Planer
PCH Internal CMOS RAM
BIOS
N/A – BIOS only control
1) Set NVRAM_CLR
jumper to clear BIOS
configuration settings at
boot and reboot system.
2) Power off the system,
remove coin cell battery
for 30 seconds, replace
battery and then power
back on.
3) Restore default
configuration in F2 system
setup menu.
BIOS SPI Flash
SPI interface via PCH
Software write protected
Not possible with any
utilities or applications
and system is not