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 typical storage hierarchy, Q. What is typical storage hierarchy? ...

Q. What is typical storage hierarchy? A typical storage hierarchy is displayed in Figure above. Though Figure shows only block diagram however it includes storage hierarchy:

Luminous Jewels - The Polishing Game, Byteland county is very famous for lu...

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Explain the test instruction, Explain the TEST instruction TEST instru...

Explain the TEST instruction TEST instruction performs the AND operation. The difference is that AND instruction changes the destination operand whereas TEST instruction doesn

Interaction goals, Most interactive products aim to satisfy a variety of us...

Most interactive products aim to satisfy a variety of usability and user experience goals. Fully satisfying all of these goals is rarely, if ever, feasible, either because of pract

Grapgh, representation of the adjacency matrix and adjacency list

representation of the adjacency matrix and adjacency list

How does cpu know that an interrupt has taken place, How does CPU know that...

How does CPU know that an interrupt has taken place? There needs to be a line or a register or status word in CPU which can be increased on occurrence of interrupt situation.

Mac address helps in which access control, MAC address helps in (A)  m...

MAC address helps in (A)  multimedia access control. (B)  media access control. (C)  mobile access control. (D) master access point control Ans: MAC addr

Target _self, TARGET = "_self" "_self" puts the new document in the s...

TARGET = "_self" "_self" puts the new document in the same window and frame as current document. "_self" works the same as if you hadn't used TARGET at all.

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