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?
iDSDM (uSD1,
Non-
2
J1, J2
16 GB, 32
NAND
Yes
Provides mass
device
Physical write-
1. Card may be
uSD2)
Volatile
GB, 64 GB
Flash
storage
resides in
protect switch
physically removed
host domain;
on ACE card
and destroyed or
they are
cleared via standard
exposed to
means, on a separate
the user via
computer.
an internally
connected,
OR
non-
removable
2. User has access to
USB mass
the card in the host
storage
domain and can clear
device
it manually
SPI Flash
Non-
2
U2
1 MB
SPI Flash
SPI flash is only
Boot firmware
User can
There is no
iDRAC may issue a
Volatile
indirectly connected
storage,
initiate a
mechanism
clear command to
to iDRAC. iDRAC
configuration
firmware
provided to
erase all contents of
can read any
and state data
update of the
iDRAC to write
the SPI NOR. This
address in the SPI
for IDSDM.
IDSDM
any SPI NOR
action may leave the
flash, but may only
device.
area outside of
IDSDM non-functional.
write the primary
the primary
firmware storage
IDSDM
area as a part of a
firmware region.
firmware update
procedure.