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c.
Select Hard Drive Utilities.
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
Table 10-1
Troubleshooting steps for nonvolatile memory usage
Nonvolatile
memory type
Amount (Size)
HP Sure Start flash
8 MB
(select models
only)
Real Time Clock
256 bytes
(RTC) battery
backed-up CMOS
configuration
memory
Controller (NIC)
64 KB (not
EEPROM
customer
accessible)
DIMM Serial
256 bytes per
Presence Detect
memory
(SPD)
module, 128
configuration data
bytes
programmable
(not customer
accessible)
Does this
Does this
memory
memory
store
retain data
customer
when power
data?
is removed?
No
Yes
No
Yes
No
Yes
No
Yes
What is the
purpose of this
How is data entered 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
computer
configuration
data for select
platforms that
support HP
Sure Start.
For more
information,
see
Using HP
Sure Start
(select models
only)
on page
86.
Stores system
RTC battery backed-up CMOS
date and time
is programmed using
and noncritical
Computer Setup (BIOS), or by
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 must be used 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
computer. The specific
write-protection method
varies by memory vendor.
Nonvolatile memory usage
83
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