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

How do we call one script-fu script from another, he trick to calling scrip...

he trick to calling script-fu-scripts from any more script is to just reference the main define for the script and not to try to use the pdb call. All the scripts in script-fu shar

Applications of microprogramming - computer architecture, Applications of M...

Applications of Microprogramming: Microprogramming application:: emulation o   Use of a micro program on 1 machine to execute programs initially written to run on ano

What are the major functions of io system, What are the major functions of ...

What are the major functions of IO system?  i. Interface to the CPU and memory by the system bus.  ii. Interface to one or more IO devices by tailored data link.

Define the term busy hour, Define the term busy hour Busy Hour: Conti...

Define the term busy hour Busy Hour: Continuous 1- hour period lying completely in the time interval concerned, for that the traffic volume or the number of calls attempts is

Predicates, Fred, Barney and Ralph belong to the La Trobe Mountain Club. Ev...

Fred, Barney and Ralph belong to the La Trobe Mountain Club. Every member of the Club is either a skier or a hiker. Anyone that doesn't like snow does not like skiing. No hikers li

Why is c standard library needed, Why is C standard library needed?  C ...

Why is C standard library needed?  C Standard Library: C would have been a tough programming language in absence of the standard library. The standard library in C contains

What is small computer systems interface, Q. What is Small Computer Systems...

Q. What is Small Computer Systems Interface? The other well-liked way is to connect a disk drive to a PC by a SCSI interface. Common drive choice for high-end workstations or s

Define swapping, Define swapping.  A process needs to be in memory to b...

Define swapping.  A process needs to be in memory to be implemented. Though a process can be swapped temporarily out of memory to a backing store and then brought back into mem

Layered architecture.., advantages and disadvantages of layered architectur...

advantages and disadvantages of layered architecture in computer network.

Explain about the prepurchase interaction activity, Explain about the Prepu...

Explain about the Prepurchase Interaction activity. Prepurchase Interaction: This interaction for consumers comprises three activities: • Product or service search and di

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