Seek time (given) = 4ms
RPM = 10000 rotation in 1 min [60 sec]
So, 1 rotation will be =60/10000 =6ms [rotation speed]
Rotation latency= 1/2 * 6ms=3ms
# To access a file, total time includes =seek time + rot. latency +transfer time
TO calc. transfer time, find transfer rate Transfer rate = bytes on track /rotation speed
so, transfer rate = 600*512/6ms =51200 B/ms
transfer time= total bytes to be transferred/ transfer rate
so, Transfer time =2000*512/51200 = 20ms
Given as each sector requires seek tim + rot. latency = 4ms+3ms =7ms
Total 2000 sector takes = 2000*7 ms =14000 ms To read entire file ,total time = 14000 + 20(transfer time) = 14020 ms