I know that transfer rate is data size over transfer speed - but according to the information given, I don't know what the data size is to calculate the transfer rate. Am I missing something or was I really not given it?
The information given is as follows:
A number of files are stored on a 10000RPM hard disk. The platters rotate clockwise. The heads move at the speed of 250 centimeters per second. The controller overhead of the hard disk is 0.2 milliseconds per I/O request. The data transfer speed is 100 MB/s. Assume one I/O request is sent for every file. The average seeking distance is 1 centimeter. Since a sector is very small, ignore the time to rotate it through under the head. Calculate the average time to fetch data for each of the scenarios below.
a. 1 file of 10 sectors is fetched. The sectors are randomly distributed on the disk.
I know I need the transfer rate to calculate fetch time - but again - I don't know the data size so I don't know how to calculate it.