HP Workstation xw4100, Сервисное и техническое руководство

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hp workstation xw4100 service and technical reference guide 3–29
system management
Master Boot Record security
The Master Boot Record (MBR) contains information needed to successfully boot from a disk
and to access the data stored on the disk. Master Boot Record Security may prevent unintentional
or malicious changes to the MBR, such as those caused by some computer viruses or by the
incorrect use of certain disk utilities. It also allows you to recover the “last known good” MBR,
should changes to the MBR be detected when the system is restarted.
To enable MBR Security, complete the following steps:
1. Turn on or restart the workstation. If you are in Windows, click Start > Shut Down > Restart
the Computer.
2. When the
F10=Setup
message appears in the lower-right corner of the screen, press the F10
key. Press Enter to bypass the title screen, if necessary.
NOTE:
If you do not press the
F10
key while the message is displayed, you must restart the
workstation to access the utility.
3. Select Security > Master Boot Record Security > Enabled.
4. Select Security > Save Master Boot Record.
5. Before exiting, click File > Save Changes and Exit.
When MBR Security is enabled, the BIOS prevents any changes being made to the MBR of the
current bootable disk while in MS-DOS or Windows Safe Mode.
NOTE:
Most operating systems control access to the MBR of the current bootable disk; the BIOS
cannot prevent changes that may occur while the operating system is running.
Each time the workstation is turned on or restarted, the BIOS compares the MBR of the current
bootable disk to the previously saved MBR. If changes are detected and if the current bootable
disk is the same disk from which the MBR was previously saved, the following message is
displayed:
1999 - Master Boot Record has changed.
Press any key to enter Setup to configure MBR Security.
Upon entering Computer Setup, you must
■ Save the MBR of the current bootable disk;
■ Restore the previously saved MBR; or
■ Disable the MBR Security feature.
You must know the setup password, if one exists. If changes are detected and if the current
bootable disk is not the same disk from which the MBR was previously saved, the following
message is displayed:
2000 - Master Boot Record Hard Drive has changed.
Press any key to enter Setup to configure MBR Security.
Upon entering Computer Setup, you must
■
Save the MBR of the current bootable disk; or
■
Disable the MBR Security feature.
You must know the setup password, if one exists.