Nonvolatile Memory Usage - HP 470 17 inch G9 Notebook PC Maintenance And Service Manual

iv.
NOTE:
into an AC outlet before starting.

Nonvolatile memory usage

Use this table to troubleshoot nonvolatile memory usage.
Table 10-1 Troubleshooting steps for nonvolatile memory usage
Nonvolatile
memory type
HP Sure Start
flash (select
models only)
Real Time Clock
(RTC) battery
backed-up
CMOS
configuration
memory
Controller (NIC)
EEPROM
Under Utilities, select Disk Sanitizer, select the hard drive with the data that you want to clear,
and then follow the on-screen instructions to continue.
The amount of time it takes for Disk Sanitizer to run can take several hours. Plug the computer
Amount (Size) Does this
memory
store
customer
data?
8 MB No
256 bytes No
64 KB (not No
customer
accessible)
Does this What is the
memory purpose of
retain data this memory?
when
power is
removed?
Yes Provides
protected
backup of
critical
System BIOS
code, EC
firmware, and
critical
computer
configuration
data for
select
platforms
that support
HP Sure Start.
For more
information,
see Using HP
Sure Start
(select
products
only) on page
79.
Yes Stores system
date and time
and
noncritical
data.
Yes Stores NIC
configuration
and NIC
firmware.
How is data entered into How is this memory
this memory? write-protected?
Data cannot be written to This memory is
this device via the host protected by the HP
processor. The content is Sure Start Embedded
managed solely by the Controller.
HP Sure Start Embedded
Controller.
RTC battery backed-up This memory is not
CMOS is programmed write-protected.
using Computer Setup
(BIOS), or by changing the
Windows date & time.
NIC EEPROM is A utility must be
programmed using a used to write data to
utility from the NIC vendor this memory and is
that can be run from DOS. available from the NIC
vendor. Writing data
to this ROM in an
inappropriate manner
will render the NIC
nonfunctional.
Nonvolatile memory usage 75