A 100Mb process is context switched out on a 1Gb/s drive with a 5ms seek time. If the CPU executing is a 1Ghz processor, how many clock cycles is spent doing the context switch out. 105,000,000 clock cycles

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Fundamentals of Input and Output Performance

The I/O subsystem is a component of computer system design that uses buses to assist communication between the Central Processing Unit, Computer Memory/Storage, and Input and Output Devices (that is known as peripheral devices). The I/O subsystem includes disc controllers, tape drives, discs, system buses, and other devices. The I/O database application reads and writes drives using the operating system windows I/O.