A disk having 200 tracks (0-199). The request sequence(82,170,43,140,24,16,190) are shown in the given figure and the head position is at 50.
(a)220
(b)650
(c)341
(d)332
ANSWER:
Question 2
Consider a disk queue with requests for I/O to blocks on cylinders 98, 183, 41, 122, 14, 124, 65, 67. The C-LOOK scheduling algorithm is used. The head is initially at cylinder number 53 moving towards larger cylinder numbers on its servicing pass. The cylinders are numbered from 0 to 199. The total head movement (in number of cylinders) incurred while servicing these requests is _______.
(a)552
(b)236
(c)998
(d)326
ANSWER:
Question 3
93, 176, 42, 148, 27, 14, 180 is the request queue. Head pointer is at 55. Calculate seek time using CLOOK
(a)319
(b)225
(c)874
(d)726
ANSWER:
Question 4
Request sequence = {176, 79, 34, 60, 92, 11, 41, 114}
Initial head position = 50
Direction = right (Moving from left to right) calculate seek time using CLOOK.
(a)552
(b)452
(c)752
(d)321
ANSWER:
Question 5
A disk contains 200 tracks. Request queue contains tracks 82,170, 43, 140, 24, 16, 190. Head track is at 50. Calculate seek time using CLOOK.
