HP Chromebook 11MK G9 Education Edition Maintenance and Service Guide - Page 63

Nonvolatile memory usage, Security, Utilities, Hard Drive Utilities, Disk Sanitizer

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i. Turn on or restart the computer, and then quickly press esc. ii. Select the Security menu and scroll down to the Utilities menu. iii. Select Hard Drive Utilities. 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 troubleshooting nonvolatile memory usage. Table 8-1 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 writeprotected? HP Sure Start flash 8 MB (select models only) No Yes Provides Data cannot be written to this This memory is protected protected device via the host processor. by the HP Sure Start backup of The content is managed solely Embedded Controller. critical System 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 products only) on page 59. Real Time Clock 256 bytes No Yes Stores system RTC battery backed-up CMOS This memory is not write- (RTC) battery date and time is programmed using protected. backed-up CMOS and noncritical Computer Setup (BIOS), or by configuration data. changing the Windows date & memory time. Controller (NIC) 64 KB (not No Yes Stores NIC NIC EEPROM is programmed A utility must be used to EEPROM customer configuration using a utility from the NIC write data to this memory accessible) and NIC vendor that can be run from and is available from the firmware. DOS. NIC vendor. Writing data to this ROM in an inappropriate manner will render the NIC non- functional. ENWW Nonvolatile memory usage 55

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i.
Turn on or restart the computer, and then quickly press
esc
.
ii.
Select the
Security
menu and scroll down to the
Utilities
menu.
iii.
Select
Hard Drive Utilities
.
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 troubleshooting nonvolatile memory usage.
Table 8-1
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
59
.
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 non-
functional.
ENWW
Nonvolatile memory usage
55