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iv.
NOTE:
into an AC outlet before starting.
Nonvolatile memory usage
Use this table to troubleshooting 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
DIMM Serial
Presence Detect
(SPD)
configuration
data
76
Chapter 10 Statement of memory volatility
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)
256 bytes per
No
memory
module, 128
bytes
programmabl
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
80.
Yes
Stores system
date and time
and
noncritical
data.
Yes
Stores NIC
configuration
and NIC
firmware.
Yes
Stores
memory
module
information.
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.
DIMM SPD is programmed
Data cannot be written
by the memory vendor.
to this memory
when the module
is installed in a
computer. The specific
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