Problem 1: Consider a disk with n tracks, the average rotational delay of r ms, and the transfer delay of f ms. Answer the following questions assuming that moving the disk head between two adjacent tracks takes t ms. 1. What is the average number of block I/Os per second? Use the average seek time = t*n/3
Problem 2: Explain why using two disks as mirrors can reduce the average seek time by half, but it does not change the transfer delay while reading a single block.
Problem 3: Compute the average number of block I/Os per second if we use two disks as mirrors with the same data.