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