HP Pro Tower ZHAN 99 G9 Desktop PC SS Maintenance and Service Guide - Page 107

Nonvolatile memory usage, Utilities, Disk Sanitizer

Get HP Pro Tower ZHAN 99 G9 Desktop PC SS PDF manuals and user guides View all HP Pro Tower ZHAN 99 G9 Desktop PC SS manuals
Add to My Manuals
Save this manual to your list of manuals

Page 107 highlights

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 How is data entered into purpose of this memory? this memory? How is this memory write-protected? HP Sure Start flash (select models only) 8 MB No Yes Provides Data cannot be written to This memory is protected this device via the host protected by the HP backup of processor. The content is Sure Start Embedded critical managed solely by the Controller. System BIOS HP Sure Start Embedded code, EC 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 104. Real Time Clock 256 bytes No Yes Stores system RTC battery backed-up This memory is not (RTC) battery date and time CMOS is programmed write-protected. backed-up and using Computer Setup CMOS noncritical (BIOS), or by changing the configuration data. Windows date & time. memory Controller (NIC) 64 KB (not No Yes Stores NIC NIC EEPROM is A utility must be EEPROM customer configuration programmed using a used to write data to accessible) and NIC utility from the NIC vendor this memory and is firmware. 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 Serial 256 bytes per No Yes Stores DIMM SPD is programmed Data cannot be written Presence Detect memory memory by the memory vendor. to this memory when (SPD) module, 128 module the module is installed bytes information. in a computer. 100 Chapter 11 Statement of memory volatility

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
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
104
.
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.
DIMM Serial
Presence Detect
(SPD)
256 bytes per
memory
module, 128
bytes
No
Yes
Stores
memory
module
information.
DIMM SPD is programmed
by the memory vendor.
Data cannot be written
to this memory when
the module is installed
in a computer.
100
Chapter 11
Statement of memory volatility