Illustrate about fat structure, Computer Engineering

Assignment Help:

Q. Illustrate about FAT structure?

DOS file system maintains a table of pointers known as FAT (File allocation table) that comprises an array of 16-bit values. There is one entry in FAT for every cluster in file area which implies that every entry of FAT (except the two) keeps up a correspondence to one cluster of disk space. If value in the FAT entry does not mark an unused, reserved or defective cluster then cluster corresponding to FAT entry is part of a file and value in FAT entry would signify the next cluster in file. 

First two entries (0 and 1) in FAT are reserved for use by operating system. Thus cluster number 2 corresponds to first cluster in data space of disk. Before any data being written on to disk FAT entries are all set to zero denoting a 'free' cluster. FAT chain for a file ends with hexadecimal value it implies that FFFF. FAT structure can be displayed as in Figure below.

387_Illustrate about FAT structure.png

Figure: FAT structure


Related Discussions:- Illustrate about fat structure

What is a path name, What is a path name?  A pathname is the path from ...

What is a path name?  A pathname is the path from the root by all subdirectories to a specified file. In a two-level directory structure a user name and a file name describe a

Explain about RISC architecture, Q. Explain about RISC ARCHITECTURE? Le...

Q. Explain about RISC ARCHITECTURE? Let's first list some significant considerations of RISC architecture: 1. RISC functions are kept simple unless there is a very good reas

What do you mean by resolution, Q. What do you mean by Resolution? Reso...

Q. What do you mean by Resolution? Resolution is parameter which defines possible sharpness or clarity of a video image.  Resolution is defined as number of pixels which make u

What is floppy drives, Q. What is Floppy Drives? Disks used with a flop...

Q. What is Floppy Drives? Disks used with a floppy disk drive are small removable disks fabricated of plastic coated with magnetic recording material. Disk rotates at 360RPM. F

Main memory location, Poor Richard's cache as explained in Conference Topic...

Poor Richard's cache as explained in Conference Topic 2. Suppose that a 7th word (gggg gggg) from main memory location 011110 is read and stored in cache. a) Determine the cach

Show the properties of frame tag, Q. Show the properties of Frame Tag? ...

Q. Show the properties of Frame Tag? This tag is used for placing an HTML file in the frame created. We should now tell browser what to put in every frame.

Explain conditions under which a deadlock situation arise, What are conditi...

What are conditions under which a deadlock situation may arise? A deadlock situation can arise if the following four conditions hold concurrently in a system:  a. Mutual exc

A subroutine can be terminated unconditionally using exit, A subroutine can...

A subroutine can be terminated unconditionally using EXIT. True.

Explain the access methods used in lans, Explain the access methods used in...

Explain the access methods used in LANs. Access methods utilized in LAN: i. Switched access: this is used in LANs which are assigned around CBXs. Electronic switching

Why is green screen more popular for compositing, Question: (a) Explain...

Question: (a) Explain clearly, from pre-production to post production how you would carry out the scene with multi-camera. (b) What are the there main aspects that should be

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd