-file system-پروژه درس سیستم عامل

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شرح پروژه

question 1

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Write a program that implements the following disk-scheduling algorithms: FCFS, SSTF, SCAN, C-SCAN, Look and CLook. Your program will service a disk with 5000 cylinders numbered 0 to 4999. The program will generate a random
series of 1000 cylinder requests and service them according to each of the algorithms listed above. The program will be passed the initial position of the disk head (as a parameter on the command line) and report the total amount of head movement required by each algorithm.

Question 2:
Create file1.txt and put some random text in it. Next, obtain the inode number of this file with the command:
ls -li file1.txt
This will produce output similar to the following:
16980 -rw-r--r-- 2 os os 22 Sep 14 16:13 file1.txt
The ln command creates a link between a source and target file. This command works as follows:
ln [-s] <source file> <target file>
UNIX provides two types of links: (i) hard links and (ii) soft links. A hard link creates a separate target file that has
the same inode as the source file. Enter the following command to create a hard link between file1.txt and
file2.txt:
ln file1.txt file2.txt
What are the inode values of file1.txt and file2.txt? Are they the same or different? Do the two files have the same
or different contents? Next, edit file2.txt and change its contents. After you have done so, examine the contents of
file1.txt. Are the contents of file1.txt and file2.txt the same or different? Next, enter the following command which
removes file1.txt:
rm file1.txt

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