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OPERATING SYSTEMThe time to move the disk arm to the desired cylinder in hard disk is known as (i) rotational latency (ii) seek time (iii) positional time (iv) disk time20232mOperating System______ is the time required to move the disk-arm to the desired track. (i) Seek time (ii) Rotational Latency (iii) Access time (iv) Waiting time20222mOPERATING SYSTEMSuppose a disk drive has cylinders, numbered 0 to 299. The current head position of the disk is at 90. The queue of pending requests, in FIFO order is 36, 79, 15, 120, 199, 270, 89, 170. Calculate the average cylinder movements for Shortest-Seek Time First (SSTF) algorithm. Mention the disadvantages of SSTF.20237mOperating SystemSuppose a disk has 100 cylinders, numbered from 0 to 99. At some time the disk arm is at cylinder 50, and there is a queue of disk access requests for cylinders 4, 34, 10, 7, 19, 73, 2, 15, 6 and 20. Assuming that shortest seek-time first (SSTF) is being used for scheduling the disk access. Calculate the total time taken to satisfy all requests if it takes 1 millisecond to move from one cylinder to adjacent one.20227m
PreviousWhich memory allocation policy allocates the largest hole to the process? (i) Best-fit (ii) Worst-fit (iii) First-fit (iv) None of the above.NextSuppose a disk has 100 cylinders, numbered from 0 to 99. At some time the disk arm is at cylinder 50, and there is a queue of disk access requests for cylinders 4, 34, 10, 7, 19, 73, 2, 15, 6 and 20. Assuming that shortest seek-time first (SSTF) is being used for scheduling the disk access. Calculate the total time taken to satisfy all requests if it takes 1 millisecond to move from one cylinder to adjacent one.