Kernel-Mode I/O Components
The purpose of this section is to describe the goals and architecture of the Windows 2000 I/O subsystem. Since different kinds of drivers perform wildly different kinds of service, the I/O Manager's categorization of drivers is also discussed.
Design Goals for the I/O Subsystem
The I/O subsystem of Windows 2000 added to the overall design goals of the operating system by including
Portability, platform to platform.
Configurability in terms of both hardware and software. For Windows 2000 drivers, this would include full support for Plug and Play buses and devices.
Preemptable and interruptable. I/O code should never block and should always be written thread-safe.
Multiprocessor-safe. The same I/O code should run on both ...
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