Reference Guide

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)
1G NIC MEZZ
SPI Flash
Flash
No
Card firmware
EEPROM
EEPROM
No
Card firmware
10G NIC MEZZ
SPI Flash
Flash
No
Card firmware
Item
How is data input to this
memory?
How is this memory
write protected?
How is the memory cleared?
Planar
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) AC power off
system, remove coin cell battery for
30 seconds, replace battery and power
back on; 3) restore default
configuration in F2 system setup
menu.
BIOS Password
Keyboard
N/A
Place shunt on J_PSWD_NVRAM
jumper pins 2 and 4.
BIOS SPI Flash
SPI interface via iDRAC
Software write
protected
Not possible with any utilities or
applications and system is not
functional if corrupted/removed.
iDRAC SPI Flash
SPI interface via iDRAC
Embedded iDRAC
subsystem firmware
actively controls sub
area based write
protection as needed.
Not completely user clearable;
however, user data, lifecycle log and
archive, SEL, fw image repository can
be cleared via Delete Configuration
and Retire System, accessible in
Lifecycle Controller interface
BMC EMMC
NAND Flash interface via
iDRAC
Embedded FW write
protected
Not completely user clearable;
however, user data, lifecycle log and
archive, SEL, fw image repository can
be cleared via Delete Configuration
and Retire System, accessible in
Lifecycle Controller interface
CPU Vcore
Regulators
Used Vender dongle and
through software.
NA
Not user clearable
System CPLD
RAM
Not utilized
Not accessible
Not accessible
System
Memory
System OS
OS Control
Reboot or power down system
CPU
Various
Various
Power off
iDRAC DDR
iDRAC Firmware
NA
Power off
iDRAC
iDRAC Firmware
NA
Power off
LOM EEPROM
SPI interface via i350
NA
Not user clearable
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