TAILIEUCHUNG - Windows Internals covering windows server 2008 and windows vista- P13

Windows Internals covering windows server 2008 and windows vista- P13: In this chapter, we’ll introduce the key Microsoft Windows operating system concepts and terms we’ll be using throughout this book, such as the Windows API, processes, threads, virtual memory, kernel mode and user mode, objects, handles, security, and the registry. | I O system objects including driver and device objects. Internally the Windows I O system operates asynchronously to achieve high performance and provides both synchronous and asynchronous I O capabilities to user-mode applications. Device drivers include not only traditional hardware device drivers but also file system network and layered filter drivers. All drivers have a common structure and communicate with one another and the I O manager by using common mechanisms. The I O system interfaces allow drivers to be written in a high-level language to lessen development time and to enhance their portability. Because drivers present a common structure to the operating system they can be layered one on top of another to achieve modularity and reduce duplication between drivers. Also all Windows device drivers should be designed to work correctly on multiprocessor systems. Finally the role of the PnP manager is to work with device drivers to dynamically detect hardware devices and to build an internal device tree that guides hardware device enumeration and driver installation. The power manager works with device drivers to move devices into low-power states when applicable to conserve energy and prolong battery life. Four more upcoming chapters in the book will cover additional topics related to the I O system storage management file systems including details on the NTFS file system the cache manager and networking. 590 Please purchase PDF Split-Merge on to remove this watermark. 8. Storage Management Storage management defines the way that an operating system interfaces with nonvolatile storage devices and media. The term storage encompasses many different devices including tape drives optical media USB flash drives floppy disks hard disks network storage such as iSCSI and storage area networks SANs . Windows provides specialized support for each of these classes of storage media. Because our focus in this book is on the kernel components of Windows in

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