Microsoft Windows Server 2003 Inside Out Introducing the (Web host music)
Microsoft Windows Server 2003 Inside Out Introducing the Registry The Registry is written as a binary database with the information organized in a hierarchy. This hierarchy has a structure much like that used by a file system and is an inverted tree with the root at the top of the tree. Any time the operating system must obtain system default values or information about your preferences, it obtains this information from the Registry. Any time you install programs or make changes in Control Panel, these changes usually are written to the Registry. Chapter 14 Note I say usually because in Windows domains some configuration information is written to Active Directory. For example, beginning with Microsoft Windows 2000, information about user accounts and network objects is stored in Active Directory. In addition, when you promote a member server to a domain controller, key Registry settings that apply to the server, such as the default configuration values, are transferred to Active Directory and thereafter managed through Active Directory. If you were later to demote the domain controller, the original Registry settings would not be restored either. Instead, the default settings are restored as they would appear on a newly installed server. The Registry s importance is that it stores most of a system s state. If you make preference and settings changes to a system, these changes are stored in the Registry. If a system dies and cannot be recovered, you don t have to install a new system and then configure it to look like the old one. You could instead install Windows Server 2003 and then restore a backup of the failed system s Registry. This would restore all the preferences and settings of the failed system on the new system. Although it s great that the Registry can store settings that you ve made, you might be wondering what else the Registry is good for. Well, in addition to storing settings that you ve made, the Registry stores settings that the system makes as well. For example, whenever a system boots, it uses Ntdetect.com to take an inventory of its hardware, and then stores this information in the Registry. The operating system kernel in turn uses this information, read from the Registry at startup, to determine which device drivers to load and in which order. The kernel also stores information needed by those drivers in the Registry, including the driver initialization parameters, which allows the device drivers to configure themselves to work with the system s hardware. Many other system components make use of the Registry as well. When you install Windows Server 2003, the setup choices you make are used to build the initial Registry database. Setup modifies the Registry whenever you add or remove hardware from a system. Similarly, application setup programs modify the Registry to store the application installation settings and to determine whether components of the application are already installed. 410 Part 4: Managing Windows Server 2003 Systems
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