CS 101/Additional Materials/Chapter 11

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Section 11.1 File Systems =

Test and Binary Files

File Types

https://en.wikipedia.org/wiki/List_of_file_formats Wikipedia to the rescue with a comprehensive list of file types grouped by category. Added by Zach Halzel on March 31, 2016

File Access

File Protection

File protection is obvious, protect your stuff, protect your files, anything important and private. There are many ways to do it. Some you have to buy if you want it to be really secure, some you have to install, depending on the computer you have. Some have the file protection settings, which is divided into 3 groups and you can edit these to be read, written or executed. You just have to be the creator of it. You can have group permissions, which only certain people can access it if you allow them to. You set the restrictions. -Liz Cochrane 3/29/2016

Section 11.2 Directories

File Organization and Pathing: https://www.youtube.com/watch?v=dpDRg--OuFA 4/5/15 Uploaded on: 2/5/12 This video overviews the topic of file organization and pathing, meaning it glosses over how different data files are kept and filtered throughout the operation system, as well as the different ways of pathing a user can use in order to find those files in that given system. Logan Martinez

Windows vs. linux directory structure http://www.howtogeek.com/137096/6-ways-the-linux-file-system-is-different-from-the-windows-file-system/ This helped me better understand and learn how to navigate the two major directory/ file systems used. Joseph Clark

Directory Trees

Path Names

Section 11.3 Disk Scheduling

http://www.cs.iit.edu/~cs561/cs450/disksched/disksched.html This page gives all basic information of Disk Scheduling. added 04-03-15 Leon Ngo This website has more in depth descriptions for each type of algorithm. It also has better examples for each algorithm. Each example uses a number line and lines underneath to show how each algorithm is performed. added: 11/6/2015 Zachary Brogna

http://www.ijcsi.org/papers/IJCSI-11-1-1-74-79.pdf Date Added 11/7/15. Date Created 1/1/14. This link goes over the basics of different algorithms for disk scheduling. The types of algorithms that are talked about in this article are First Come First Served, Shortest Seek Time First, SCAN, C-SCAN, LOOK, and C-LOOK. The paper also gives an example problem with the explanation of each algorithm. ~Caitlyn Lambert-Hutchinson

http://www.ecs.umass.edu/ece/koren/architecture/Disk/help.htm This website helped me a lot because in each disk scheduling algorithm it took you step by step and then also a had an entire other simulation page. Date created: unknown Date added: 11-8-15 ~Rebecca Sherr

https://www.youtube.com/watch?v=RrQ6oh9w6yg This video explains overview of disk scheduling, its purposes, and how disk scheduling affects different types of disk devices. It is uploaded by Mike Murphy on Sep 5, 2011. Sworup Ojha 3/31/16

What is Disk Scheduling? Type of Disk Scheduling?: http://ecomputernotes.com/fundamental/disk-operating-system/what-is-disk-scheduling-type-of-disk-scheduling - Website gives detailed descriptions of the different types of disk scheduling. Easy to follow along with. Date Created: Unknown. Date Added: 3/31/2016 - Samantha Stuart


First Come, First Served Disk Scheduling

Shortest-Seek-Time-First Disk Scheduling

SCAN Disk Scheduling