HP Professional sp750 Compaq Professional Workstation SP750 Hardware Reference - Page 55

Disable MBR Security before intentionally, Save Master Boot Record

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Computer Setup Continued Heading Option Description Security (continued) Master Boot Record Security Allows you to enable or disable Master Boot Record (MBR) Security. When enabled, the BIOS rejects all requests to write to the MBR on the current bootable disk. Each time the computer is powered on or rebooted, the BIOS compares the MBR of the current bootable disk to the previously-saved MBR. If changes are detected, you are given the option of saving the MBR on the current bootable disk, restoring the previously-saved MBR, or disabling MBR Security. You must know the setup password, if one is set. Note: Disable MBR Security before intentionally changing the formatting or partitioning of the current bootable disk. Several disk utilities (such as .DISK and .ORMAT) attempt to update the MBR. If MBR Security is enabled and disk accesses are being serviced by the BIOS, write requests to the MBR are rejected, causing the utilities to report errors. If MBR Security is enabled and disk accesses are being serviced by the operating system, any MBR change will be detected by the BIOS during the next reboot, and an MBR Security warning message will be displayed. .eature supported on select models only. Save Master Boot Record Saves a backup copy of the Master Boot Record of the current bootable disk. Note: Only appears if MBR Security is enabled. Restore Master Boot Record Restores the backup Master Boot Record to the current bootable disk. Note: Only appears if all of the following conditions are true: • MBR Security is enabled • A backup copy of the MBR has been previously saved • The current bootable disk is the same disk from which the backup copy of the MBR was saved Support for Computer Setup options may vary depending on your specific hardware configuration. Continued B-10 Computer Setup

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B-10
Computer Setup
Compaq Confidential - Need to Know Required
Computer Setup
Continued
Heading
Option
Description
Security
(continued)
Master Boot Record
Security
Allows you to enable or disable Master Boot Record
(MBR) Security.
When enabled, the BIOS rejects all requests to write
to the MBR on the current bootable disk. Each time
the computer is powered on or rebooted, the BIOS
compares the MBR of the current bootable disk to the
previously-saved MBR. If changes are detected, you
are given the option of saving the MBR on the current
bootable disk, restoring the previously-saved MBR,
or disabling MBR Security. You must know the setup
password, if one is set.
Note
: Disable MBR Security before intentionally
changing the formatting or partitioning of the current
bootable disk. Several disk utilities (such as ±DISK
and ±ORMAT) attempt to update the MBR. If MBR
Security is enabled and disk accesses are being
serviced by the BIOS, write requests to the MBR are
rejected, causing the utilities to report errors. If MBR
Security is enabled and disk accesses are being
serviced by the operating system, any MBR change
will be detected by the BIOS during the next reboot,
and an MBR Security warning message will be
displayed.
±eature supported on select models only.
Save Master Boot Record
Saves a backup copy of the Master Boot Record of
the current bootable disk.
Note
: Only appears if MBR Security is enabled.
Restore Master Boot
Record
Restores the backup Master Boot Record to the
current bootable disk.
Note
: Only appears if all of the following conditions
are true:
•
MBR Security is enabled
•
A backup copy of the MBR has been previously
saved
•
The current bootable disk is the same disk from
which the backup copy of the MBR was saved
Support for Computer Setup options may vary depending on your specific hardware configuration.
Continued