HP xw4000 Service & Reference Manual page 21

Heading Option
Security DriveLock*
(continued)
Master Boot
Record Security*
Save Master
Boot Record*
Restore Master
Boot
Record*
Device Security
Network Service
Boot
*Option not supported on all products.
Service Reference Guide
Description (Continued)
Allows you to assign or modify a master or user password for
certain hard drives. When 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 drive that
supports the DriveLock feature is attached to the system.
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 on the
current bootable disk, restoring the previously saved MBR, or
disabling MBR security, You must know the 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.
Enables/disables serial ports A & B; parallel and USB ports;
system audio; network controller (some models); and SCSI
controllers.
Enables/disables Network Service Boot. (Feature supported on
select models only.)
Setup Utilities and Diagnostic Features
2–7