Reference Guide

Item
Non-
Volatile or
Volatile
Quantity
Reference
Designator
Size of
memory
Type of
memory
(e.g. Flash
PROM,
EEPROM)
Can user programs
or operating
system write data
to it during normal
operation?
What is the
Purpose?
(e.g. boot
code)
How is data
written to
this
memory?
How is
memory write-
protected?
How is memory
cleared?
iDRAC SPI
Flash
Non-
Volatile
1
U_BMC_S
PI1
4 MB
SPI Flash
No
iDRAC Uboot
(bootloader)
SPI interface
via iDRAC
Embedded
iDRAC
subsystem
firmware
actively controls
sub area based
write protection
as needed.
User cannot clear the
memory completely.
However, user data,
lifecycle log and
archive, SEL, firmware
image repository can
be cleared via Delete
Configuration and
Retire System,
accessible in Lifecycle
Controller interface
BMC EMMC
Non-
Volatile
1
U_EMMC1
4 GB
eMMC
NAND
Flash
No
Operational
iDRAC FW,
Lifecycle
Controller (LC)
USC partition,
LC service
diags, LC OS
drivers, USC
firmware
NAND Flash
interface via
iDRAC
Embedded FW
write protected
User cannot clear the
memory completely.
However, user data,
lifecycle log and
archive, SEL, firmware
image repository can
be cleared via Delete
Configuration and
Retire System,
accessible in Lifecycle
Controller interface
CPU Vcore
regulator
Non-
Volatile
2
PU1
16 KB
ROM
No
Operational
parameters
Programmed
at factory via
I2C
Not write-
protected
User cannot clear the
memory.