Consider a disk drive device with block size 512 bytes and data transfer rate is 512 b ytes/ msec. The disk drive rotates at a speed of 2400 RPM (rotations per minute) . The average seek time is 30 msec.

Question

(a) How much time does it take (on average) in msec to locate and transfer a single block given its block address?

(b) Calculate the average time it would take to transfer 10 random blocks on disk and compare it with the time it would take to transfer 10 consecutive blocks on the same track

(c) What is the time on average to search for a record in a file containing 100 blocks if the file blocks are stored contiguously on the same track? Suppose the file is unordered.

Answer rating: 100% (QA)

Block size 512 bytes Data transfer rate 512 bytes msec Drive rotates at a speed 2400 RPM average se... View the full answer