Master Boot Record Security - HP xw4000 Supplementary Manual

Computer Setup (Continued)
Heading
Security
(continued)
✎
Support for specific Computer Setup options may vary depending on your hardware
configuration.
Computer Setup (F10) Utility Guide
Option
Master Boot Record
Security
Description
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.
✎
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.
Computer Setup (F10) Utility
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