Assume that a hard disk has the following characteristics: Rotation speed = 7,200 rev/min Arm movement time = 0.5 msec fixed startup time + 0.05 msec for each track crossed. (The startup time is a constant no matter how far the arm moves.) Assume on average the disk arm must move 150 tracks. Number of surfaces = 2 (This is a double-sided disk. A single read/write arm holds both read/write heads.) Number of tracks per surface = 500 Number of sectors per track = 20 Number of characters per sector = 1,024 a. How many characters can be stored on this disk? b. What are the best-case, worst-case, and average-case access times for this disk?

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A:

Q: Total average time to satisfy a request

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A: The Answer is

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A:

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A: Answer:-25%

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A: Here, I have to provide a solution to the above question.

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A:

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Q: What are the best-case, worst-case, and average-case access times for this disk? (Assume that the…

A:

Q: Q2) Consider a magnetic disk drive with 8 surfaces, 512 tracks per surface, and 64 sectors per…

A: A)  Disk capacity = 8*512*64*1KB = 228 B = 256MB

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A: Below I have provided the handwritten solution of the given question:

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.