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3 Cards in this Set
- Front
- Back
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Goals of IO management |
1. users should be able to access any device in a uniform manner 2. all devices should be uniformly named 3. the OS should handle recoverable errors without intervention from user program 4. OS must maintain security for these devices 5. OS should optimize performance of the IO system |
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IO subsystems must contend with 2 conflicting tends |
1. standard interface for a wide range of devices to make it easy to add newly developed devices 2. development of entirely new devices where standard existing interfaces are not always easy to apply |
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Device drivers |
SW that handles a particular service or category of similar devices |
