0 votes 0 votes Consider the following disk request sequence for a disk with 100 tracks. 98, 183, 37, 122, 14, 124, 65, 67 Head pointer starting at 53 (current position of R/W heads).Find the number of head movements in cylinders using SSTF scheduling. Operating System made-easy-test-series operating-system disk-scheduling + – Jitendra Verma asked Mar 16, 2016 edited Mar 5, 2019 by akash.dinkar12 Jitendra Verma 3.3k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 4 votes 4 votes The current Rw head is at 53 . it follows :53--65--67--37--14--98--122--124--183 so number of head movement is ( 65-53) + ( 67-65) + ( 67-37) +( 37-14) + (98-14) +(122-98)+(124-122)+(183-124) =12 +2+30+23+84+24+2+59=236 movements priti answered Mar 16, 2016 selected Mar 16, 2016 by Jitendra Verma priti comment Share Follow See all 2 Comments See all 2 2 Comments reply Jitendra Verma commented Mar 16, 2016 reply Follow Share My answer is also coming 236 but in book it's given 222 maybe need to check more. 1 votes 1 votes Anmol Verma commented Jan 18, 2017 reply Follow Share Ans in 236 but chance that damn 100 tracks to 200.....!!!! 0 votes 0 votes Please log in or register to add a comment.