Reference Guide

Dell - Internal Use - Confidential
IDSDM SPI flash
Non-Volatile
1
U_SPI
8Mb
rSPI flash
Non-Volatile
1
U_RSPI
4MB
rSPI Card
rSPI flash
Non-Volatile
1
U_RSPI
4MB
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)
Planer
PCH Internal CMOS RAM
Battery-backed CMOS RAM
Yes
Real-time clock and
BIOS configuration
settings
BIOS SPI Flash
SPI Flash
Yes
Boot code, system
configuration
information, UEFI
environment, Flash
Disceptor, ME
iDRAC SPI Flash
SPI Flash
Yes
iDRAC Uboot
(bootloader),
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,
BMC EMMC
eMMC NAND Flash
Yes
Operational iDRAC
FW, Lifecycle
Controller (LC) USC
partition, LC service
diags, LC OS
drivers, USC
firmware
BMC Memory
RAM
Yes
iDRAC RAM.
CPU Vcore and Memory
regulator
NVRAM
No
CPU Vcore and
Memory controller
System CPLD
Flash
Yes
Power sequence
controller and
detection.