OperSystemsReview

OperSystemsReview - Operating Systems CS644/CS320 Spring...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Operating Systems CS644/CS320, Spring 2006 Review Problems Input / Output Devices: 1- What are the main differences between the disk and the drum? 2- A disk is double interleaved. It has eight sectors of 512 per track, and a rotation rate of 300 rpm. How long does it take to read all the sectors of a track in order, assuming the arm is already correctly positioned, and 1/2 rotation is needed to get sector 0 under the head? What is the data rate ? Now repeat the problem for non-interleaving disk with the same characteristics . How much does the data rate degrade due to interleaving? 3- Name the I/O software layer(s) that performs each of the following function: a- Computing the track, sector, and head for a disk read. b- Maintaining a cache of recently used blocks. c- Writing commands to the device registers. d- Checking to see if the user is permitted to use the device. e- Converting binary integers to ASCII for printing....
View Full Document

Ask a homework question - tutors are online