Nonvolatile Memory Usage - HP EliteBook 846 G5 Maintenance And Service Manual

NOTE:
into an AC outlet before starting.
a. Turn on or restart the computer, and then press
message is displayed at the bottom of the screen.
b. Select the Security menu and scroll down to the Utilities menu.
c. Select Hard Drive Tools.
d. Under Utilities, select Disk Sanitizer, select the hard drive storing the data you want to clear, and
then follow the on-screen instructions to continue.

Nonvolatile memory usage

Nonvolatile
Memory Type Amount (Size)
HP Sure Start flash 2 MBytes
(select models
only)
Real Time Clock 256 Bytes
(RTC) battery
backed-up CMOS
configuration
memory
Controller (NIC) 64 KBytes (not
EEPROM customer
accessible)
DIMM Serial 256 Bytes per
Presence Detect memory
(SPD) module, 128
configuration data Bytes
programmable
The amount of time it takes for Disk Sanitizer to run can take several hours. Plug the computer
Does this Does this
memory memory
store retain data
customer when power
data? is removed?
No Yes
No Yes
No Yes
No Yes
esc while the "Press the ESC key for Startup Menu"
What is the
purpose of this How is data input into this
memory? memory?
Provides Data cannot be written to this
protected device via the host processor.
backup of The content is managed
critical System solely by the HP Sure Start
BIOS code, EC Embedded Controller.
firmware, and
critical PC
configuration
data for select
platforms that
support HP
Sure Start.
For more
information,
see Using HP
Sure Start
(select models
only)
on page 104.
Stores system RTC battery backed-up CMOS
date and time is programmed using the
and noncritical Computer Setup (BIOS), or
data. changing the Microsoft
Windows date & time.
Stores NIC NIC EEPROM is programmed
configuration using a utility from the NIC
and NIC vendor that can be run from
firmware. DOS.
Stores memory DIMM SPD is programmed by
module the memory vendor.
information.
How is this memory
write-protected?
This memory is protected
by the HP Sure Start
Embedded Controller.
This memory is not write-
protected.
A utility is required to
write data to this memory
and is available from the
NIC vendor. Writing data
to this ROM in an
inappropriate manner will
render the NIC non-
functional.
Data cannot be written to
this memory when the
module is installed in a
PC. The specific write-
protection method varies
by memory vendor.
Nonvolatile memory usage 101