BCD Element Think of these as properties and parameters to the BCD object.
Each element represents one property or parameter??”for
example, the name of the operating system or a debugger setting.
Figure 1-9. BCD component hierarchy
BCD Store
BCD Object
BCD Element
BCD Element
BCD Object BCD Object
BCD Element
BCD Element
BCD Element
BCD Element
12 Microsoft Windows Server 2008 Administration
Since the system store knows all about the installed operating systems on the computer,
if it detects a multi-boot environment, it is also responsible for displaying the
Windows Boot Manager OS selection menu, as shown in Figure 1-10. Each system store
contains, minimally, two BCD objects as well as additional options (Table 1-3).
Although it all sounds complicated, it really isn??™t. You can take apart a simple boot
.ini file, such as the one shown here, and translate it quickly to a BCD format (Table 1-4).
Figure 1-10. Windows Boot Manager showing multi-boot screen and Windows Memory Diagnostic
option
13 Chapter 1: Getting Started with Windows Server 2008
BCD Object
Each BCD object is identified uniquely using a 128-bit GUID that contains a 32-bit description
about the type of object it represents. The three object categories are application
objects, inheritable objects, and device objects. The application objects type is the most
common type and is the object type for the Windows Boot Manager, Windows boot loader
objects including NTLDR, Windows resume loader, and Windows memory tester.
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