【非選題】 9.【題組】(4) Let average page-fault time and memory-access time be 70us and 250ns, respectively. What is the
expected page-fault rate if we want to get effective access time smaller than 285ns? List your
【非選題】 12.【題組】(2) Consider a disk queue with requests for I/O to blocks on cylinders 100, 185, 40, 120, 2, 138, 75
and 87. Let the disk head currently stay at cylinder 60, and the maximum cylinder be 200. Please
give the results of SSTF and C-LOOK scheduling methods.