Engineering, 30.04.2021 17:30, tyler6933

A program repeatedly performs a three-step process: it reads in a 4-KB block of data from disk, does some processing on that data, and then writes out the result as another 4-KB elsewhere on the disk. Each block is contiguous and randomly located on a single track on the disk. The disk drive rotates at 7200 RPM, has an average seek time of 8 ms, and has a transfer rate of 20 MB/sec. The controller overhead is 2 ms. No other program is using the disk or processor, and there is no overlapping of disk operation with processing. The processing step takes 20 million clock cycles, and the clock rate is 400 MHz. Required:
What is the overall speed of the system in blocks processed per second?

Answers: 1

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 19:10, ultimateapes

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?

Answers: 2

continue

Engineering, 04.07.2019 19:10, nbug2121

Arigid tank contains 10 kg of air at 137 kpa (abs) and 21°c. more air is added to the tank until the pressure and temperature rise to 242 kpa (abs) and 32°c, respectively. determine the amount of air added to the tank. [r-0.287 kj/kg k]

Answers: 3

continue

Engineering, 04.07.2019 19:20, anggar20

Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3

Answers: 2

continue

Engineering, 04.07.2019 19:20, holaadios222lol

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.

Answers: 1

continue

Do you know the correct answer?

A program repeatedly performs a three-step process: it reads in a 4-KB block of data from disk, does...