HP Engage Go 13.5 Maintenance and Service Guide - Page 104

Nonvolatile memory usage, Utilities, Disk Sanitizer

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iv. 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. NOTE: The amount of time it takes for Disk Sanitizer to run can take several hours. Plug the computer into an AC outlet before starting. Nonvolatile memory usage Use this table to troubleshoot nonvolatile memory usage. Table 11-1 Troubleshooting steps for nonvolatile memory usage Nonvolatile memory type Amount (Size) Does this memory store customer data? Does this memory retain data when power is removed? What is the purpose of this memory? How is data entered into How is this memory this memory? write-protected? HP Sure Start flash (select models only) 8 MB No Yes Provides Data cannot be written This memory is protected to this device via the protected by the HP backup of host processor. The Sure Start Embedded critical content is managed Controller. System BIOS solely by the HP code, EC Sure Start Embedded firmware, Controller. 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 101. Real Time 256 bytes No Yes Stores RTC battery backed-up This memory is not Clock (RTC) system date CMOS is programmed write-protected. battery and time and using Computer Setup backed-up noncritical (BIOS), or by changing CMOS data. the Windows date & configuration time. memory Controller 64 KB (not No Yes Stores NIC NIC EEPROM is A utility must be (NIC) EEPROM customer configuration programmed using a used to write data accessible) and NIC utility from the NIC to this memory and firmware. vendor that can be run is available from the from DOS. NIC vendor. Writing data to this ROM in an inappropriate manner will render the NIC nonfunctional. Nonvolatile memory usage 97

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iv.
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.
NOTE:
The amount of time it takes for Disk Sanitizer to run can take several hours. Plug the
computer into an AC outlet before starting.
Nonvolatile memory usage
Use this table to troubleshoot nonvolatile memory usage.
Table 11-1
Troubleshooting steps for nonvolatile memory usage
Nonvolatile
memory type
Amount (Size)
Does this
memory
store
customer
data?
Does this
memory
retain data
when
power is
removed?
What is the
purpose of
this
memory?
How is data entered into
this memory?
How is this memory
write-protected?
HP Sure Start
flash (select
models only)
8 MB
No
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
101
.
Data cannot be written
to this device via the
host processor. The
content is managed
solely by the HP
Sure Start Embedded
Controller.
This memory is
protected by the HP
Sure Start Embedded
Controller.
Real Time
Clock (RTC)
battery
backed-up
CMOS
configuration
memory
256 bytes
No
Yes
Stores
system date
and time and
noncritical
data.
RTC battery backed-up
CMOS is programmed
using Computer Setup
(BIOS), or by changing
the Windows date &
time.
This memory is not
write-protected.
Controller
(NIC) EEPROM
64 KB (not
customer
accessible)
No
Yes
Stores NIC
configuration
and NIC
firmware.
NIC EEPROM is
programmed using a
utility from the NIC
vendor that can be run
from DOS.
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
nonfunctional.
Nonvolatile memory usage
97