Computer Setup

Computer Setup (Continued)

Heading

Option

Description

 

 

 

Security

Master Boot Record

Allows you to enable or disable Master Boot

(continued)

Security*

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.

 

 

✎ Disable MBR Security before

 

 

intentionally changing the formatting or

 

 

partitioning of the current bootable disk.

 

 

Several disk utilities (such as FDISK and

 

 

FORMAT) 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.

Support for Computer Setup options may vary depending on your specific hardware configuration.

*Option not supported on all products.

Computer Setup Guide

13