Reference Guide

Dell - Internal Use - Confidential
Item
How is data input to this
memory?
How is this memory write
protected?
How is the memory
cleared?
accessed through the
Lifecycle Controller
interface.
BMC EMMC
NAND Flash interface via
iDRAC
Embedded FW write
protected
The user cannot clear
memory completely.
However, user data,
lifecycle log and archive,
SEL, and fw image
repository can be cleared
using Delete
Configuration and Retire
System, which can be
accessed through the
Lifecycle Controller
interface.
Memory VDDQ, CPU Vcore
and VSA Regulators
Once values are loaded
into register space a cmd
writes to nvm.
There are passwords for
different sections of the
register space
The user cannot clear
memory.
System CPLD RAM
Not utilized
Not accessible
Not accessible
System Memory
System OS
OS Control
Reboot or power down
system
Internal USB Key
USB interface via PCH.
Accessed via system OS
No write protected
Can be cleared in the
system OS
Trusted Platform Module
(TPM, TPM 2.0 only)
Using TPM Enabled
operating systems
SW write protected
F2 Setup option
LOM SPI FLASH
The data is flash via Dell
Update Package(DUP)
Reserving write protection
function for HW design.
User cannot clear the
memory.
4 x 3.5"; 8 x 2.5" SAS/SATA front Backplane
SEP internal flash
I2C interface via iDRAC
Program write protect bit
The user cannot clear
memory.
Backplane External FRU
Programmed at ICT during
production.
No write protected
The user cannot clear
memory.
H345/H745/H755/H755N fPERC
H345/H745/H755/H840 Adapter PERC
NVSRAM
ROC writes configuration
data to NVSRAM
no write protected. Not
visible to Host Processor
User cannot clear the
memory.
SPD
Pre-programmed before
assembly
no write protected. Not
visible to Host Processor
User cannot clear the
memory.
Flash
Pre-programmed before
assembly. Can be updated
using Dell/LSI tools
no write protected. Not
visible to Host Processor
User cannot clear the
memory.
Backup Flash
FPGA backs up DDR data
to this device in case of a
power failure
no write protected. Not
visible to Host Processor
Flash can be cleared by
powering up the card and
allowing the controller to
flush the contents to VDs.
If the VDs are no longer
available, cache can be
cleared by going into
controller BIOS and
selecting Discard
Preserved Cache.