Reference Guide

Data flow
The memtool is not part of the data path and does not participate in the data flow.
nvramtool
To read and write the NVRAM bits that the BIOS uses to control testing and the bits for the EDA tools, use the nvramtool.
The NVRAM is an area, usually in a battery backed-up device such as an RTC chip, that allows the writing of bits that do not
change across reboots or power cycles. These bits are used to control how devices boot and how the tests are performed.
The nvramtool controls both the BIOS and EDA for testing. The bits are not common across platforms and are defined in
the configuration file. When using this tool, you must write the correct bits because the tool does not know the details of the
registers it is writing. The nvramtool can display the bit-level detail in the NVRAM registers, depending on how you define it in
the configuration file.
Tests
There are no tests of the NVRAM. This tool only controls the bits.
CLI option
DellEmc Diag - NVRAM Tool
version 1.5, x.xx.x.x-x
build, 2017/05/23,
Syntax: nvramtool <option>
Show this help:=
nvramtool --h (or)
nvramtool -h
Read all or specfic register NVRAM values:=
nvramtool --read [--reg=<register>] (or)
nvramtool -r [-R <register>]
Write NVRAM value:=
nvramtool --write [--reg=<register> --val=<value>] (or)
nvramtool -w [-R <register> -V <value>]
Execute repeatedly command by count:=
nvramtool --iteration=max/<count> [option1] [option2]...(or)
nvramtool -I max/<count> [option1] [option2]...
Usage:
-h, --h Show the help text
-r, --read Read operation
-w, --write Write operation
-I, --iteration= Iteration command execution
-R, --reg= Register
-V, --val= Value to be set
Output
read output
root@dell-diag-os:~# nvramtool --read
NVRAM Values:
0x00 0x9f 0x00 0xe6 0x03 0x03 0x00 0xea
Test Status Fail Bits : offset 0x50 = 0x0
7 NVRAM test = 0
6 SSD test = 0
5 COLD/SMF Reg check = 0
4 PCI test = 0
Dell EMC DIAG OS tools
61