HP dc5100 - Microtower PC Service & Reference Manual page 19

Heading Option
Security DriveLock Security
(continued)
Data Execution
Prevention
Master Boot
Record Security*
Save Master Boot
Record*
Restore Master
Boot Record*
✎
Support for specific Computer Setup options may vary depending on the hardware configuration.
Service Reference Guide, dc5100
Allows you to assign or modify a master or user password for
MultiBay hard drives. When this feature is enabled, the user is
prompted to provide one of the DriveLock passwords during POST. If
neither is successfully entered, the hard drive will remain
inaccessible until one of the passwords is successfully provided
during a subsequent cold-boot sequence.
✎
This selection will only appear when at least one MultiBay drive
that supports the DriveLock feature is attached to the system.
See the Desktop Management Guide on the Documentation CD for
more information.
Enable/Disable.
Data Execution Prevention Mode help prevent OS security breaches.
✎
This selection is in effect only if the processor and operating
system being used comprehend and utilize the function.
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 bootable disk to the
previously saved MBR. If changes are detected, you are given the
option of saving the MBR of 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.
Saves a backup copy of the Master Boot Record of the current
bootable disk.
✎
Only appears if MBR Security is enabled.
Restores the backup Master Boot Record to the current bootable
disk.
✎
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.
Ä
CAUTION: Restoring a previously saved MBR after a disk utility
or operating system has modified the MBR may cause the data on
the disk to become inaccessible. Only restore a previously saved
MBR ifyou are confident that the current bootable disk's MBR has
been corrupted or infected with a virus.
376220-001
Setup Utilities and Diagnostics Features
Description
2–9