5 Disk, seek time, latency, sector, request
Single-platter disk
rotation speed: 7200 rpm
number of tracks on one side of platter: 30,000
number of sectors per track: 600
seek time: 1 ms for every 100 tracks traversed
Disk receives a request to access a random sector on a random track.
assume the head starts at track 0.
a. What is the average seek time?
b. ave. rotational latency?
c. transfer time for a sector?
d. total ave. time to satisfy a request?