Dell R420 User Manual



Statement of Volatility – Dell PowerEdge R420

Dell PowerEdge R 4 2 0 c on t ain s both volatile and no n- v ol at il e ( N V) c o m po nents. Volatile compo n e nt s lo s e th ei r
data immediat ely up on r em o v al of p ow e r from t he component. Non-volatile components continue to retain their
data even after the power has been removed from the component. Components chosen as user-definable
configuration op t i ons (t h o s e no t so l de re d to t he m o t h er b o ar d) ar e n ot incl u d ed in t he St atement of Volatility.
Configuration option information (pertinent to options such as microprocessors, remote access controllers, and
storage controllers) is available by component separately. The following NV components are present in the
PowerEdge R420 server.



Item Non-

Volatile or
Volitile

Planer

PCH Internal CMOS RAM Non-Volatile 1 U39 256 Bytes

BIOS SPI Flash Non-Volatile 1 U4-1 8 MB

iDRAC SPI Flash Non-Volatile 1 U22-1 4 MB

BMC EMMC Non-Volatile 1 U45 2 GB

System CPLD RAM Volatile 1 U19 8kb

System Memory Volatile Up to 6 per

Power Supplies

PSU FW Non-Volatile 1 per PSU Varies by part number Up to 2MB. Varies by

4x3.5" Backplane

SEP internal flash Non-Volatile 1 U_SEP

Quantity Reference Designat o r Size

CPU

CPU1: DIMM1~DIMM6,
CPU2: DIMM7~DIMM12

Up to 32GB per
DIMM

part number

Flash:32KB + 4KB
EEPROM: 1KB

8x2.5" Backplane

SEP internal flash Non-Volatile 1 U3(SEP) Flash:32KB + 4KB

EEPROM: 1KB



02 - 2013



Item Type (e.g. Flash PROM,

EEPROM)

Planer

PCH Internal CMOS RAM Battery-backed CMOS

RAM

BIOS SPI Flash SPI Flash YES Boot code, system

iDRAC SPI Flash SPI Flash No iDRAC Uboot (bootloader),

BMC EMMC eMMC NAND Flash No Operational iDRAC FW,

Can user programs
or operating system
write data to it
during normal
operation?

No Real-time clock and BIOS

Purpose? (e.g. boot code)

configuration settings

configuration information, UEFI
environment, Flash Disceptor,
ME

server managent persistent
store (i.e. IDRAC MAC
Address, iDRAC boot
variables), lifecycle log cache,
virtual planar FRU and EPPID,
rac log, System Event Log,
JobStore, iDRAC Secure Boot
Code,

Lifecycle Controller (LC) USC
partition, LC service diags, LC
OS drivers, USC firmware

CPU Vcore and VSA
Regulators

System CPLD RAM RAM No Not utilized

System Memory RAM Yes System OS RAM

Power Supplies

PSU FW Embedded

4x3.5" Backplane

SEP internal flash Integrated

8x2.5" Backplane

SEP internal flash Integrated

OTP(one time
programmable)

microcontroller flash

Flash+EEPROM

Flash+EEPROM

No Operational parameters

No Power Supply operation,

power management data and
fault behaviors

No Firmware + FRU

No Firmware + FRU

