Storge Network Management and Retrieval (Numerical) - May 2016

Consider a disk I/O system in which an I/O request arrives at a rate of 100 I/Os per second. The disk service time is Rs = 8ms. Calculate the measure of disk performance

1.   utilization of I/O controller(U)
2.  Total response time (R)
3.  Average Queue size
4.  Total time spent by a request in a queue

Considering the same disk I/O system and calculate the abovemeasure of the disk performance if the disk service time is halved i.e. Rs=4ms