February 2015 Archive


The MS-DOS File System
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The MS-DOS File System

The MS-DOS file system is the one the first IBM PCs came with. It was the main file system up through Windows 98 and Windows ME. It is still supported on Windows 2000, Windows XP, and Windows Vista, although it is no longer standard on new PCs now except for floppy disks.

The UNIX V7 File System
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The UNIX V7 File System

The early versions of UNIX had a fairly sophisticated multiuser file system since it was derived from MULTICS. Below we will talk about the V7 file system, the one for the PDP-11 that made UNIX famous. The file system is in the form of a tree starting at the root directory, with the

INPUT/OUTPUT
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INPUT/OUTPUT

In addition to providing abstractions such as processes (and threads), address spaces, and files, an operating system also controls all the computer's I/O (Input/Output) devices. It must issue commands to the devices, catch interrupts, and handle errors. It should also provide an

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