آخر المواضيع

الجمعة، 14 أكتوبر، 2011

FAT & NTFS File System






**FAT & NTFS File System**

FAT File System

FAT gets its name from the use of a kind of database called a File Allocation Table that contains an entry for each cluster on the disk. The FAT system has been in use by Microsoft since before DOS 1 (the first version was devised by a teenager named Bill Gates) and has undergone several revisions. There are versions called FAT12, FAT16, and FAT32. The numbers refer to the number of bits used for the cluster entries in the table

Anther Definition

A file allocation table (FAT) is a table that an operating system maintains on a hard disk that provides a map of the clusters (the basic units of logical storage on a hard disk) that a file has been stored in. When write a new file to a hard disk, the file is stored in one or more clusters that are not necessarily

Note:-

»FAT32
A derivative of the file allocation table (FAT) file system. FAT32 supports smaller cluster sizes and larger volumes than FAT, which results in more efficient space allocation on FAT32 volumes.

NTFS File System

NTFS get its name from New Technology File System is a file system that was introduced by Microsoft in 1993 with Windows NT 3.1. NTFS supports hard drive sizes up to 256TB.

NTFS is the primary file system used in Microsoft's Windows 7, Windows Vista, Windows XP, Windows 2000 and Windows NT operating systems. The Windows Server line of operating systems also primarily use NTFS.

Note:-

»Difference between NTFS & NTFS Quick

Quick format is basically only removes files from the partition and does not scan the disk for bad sectors etc so it takes short time. I would go for a normal format. Select it, leave it alone and come back to check it out later on.

» Some older programs may not run on an NTFS volume, so you should research the current requirements for your software before converting

Choosing Between NTFS, FAT, and FAT32:-

Choose between three file systems for disk partitions on a computer running Windows XP: NTFS, FAT, and FAT32. NTFS is the recommended file system because it’ is more powerful

And provides performance, security, reliability, and advanced features that are not found in any version of FAT or FAT32.

For example, NTFS guarantees volume consistency by using standard transaction logging and recovery techniques. If a system fails, NTFS uses its log file and checkpoint information to restore the consistency of the file system. In Windows 2000 and Windows XP, NTFS also provides advanced features such as file and folder permissions, encryption, disk quotas, and compression.

Note:-

Conversion. FAT32 to NTFS is possible and easy but conversion NTFS to FAT32 is not possible and would cause loss of data.

Convert FAT to NTFS:-

-Standard Windows utility that is called CONVERT serves this purpose

-Just go to the Command Prompt and execute the command:

-C:\> CONVERT  C:  /fs:ntfs

-Where C: is a name of the drive you want to convert.

---After machine re-boot conversion process will start and FAT32 converted to NTFS without of data loss.

Comparison between the sizes of disks and files possible with each file system:-

NTFS
-The minimum recommended size of the volume is 10 megabytes approximately.
Can be volumes larger than 2 terabytes.
-File size is limited to the size and volume only.

Note:-
-Can not be used on floppy disks.

-Does not write on the BAD SECTOR easily and can continue to work
-Slower in the division of the previous systems
-Slower in reading and writing files and getting slow if there are
Prohibitions on the file in large
-Not supported by any Windows NT4
DOS does not support

FAT
-Volumes of the size of the floppy disk and up to 4 GB.
The maximum file size is 2 GB.

Note:-

-Strongly influenced by the presence of the hard BAD SECTOR.


FAT32
-
Volumes from 512 MB ​​to 2 terabytes.
In Windows XP, you can format a FAT32 volume up to 32 GB only.
The maximum file size is 4 GB.

Note:-

-Influenced by the presence on the hard BAD SECTOR.
-Does not support Windows 95, NT3
-Does not support DOS, but the average for FAT32 (such as the WINDOWS STARTUP DISK).- NTFS system cause some problems when dealing with some older games
and also needs the device for do not feel slow at dealing with it.
2 - the worst thing NTFS will not be read on Windows 98 or Millennium
Thus,
For example if you visit one of your friends and hard adapter partition NTFS and your friend has Windows 98 or Millennium will not see the hard final and can not deal
with it.
3 - for pressure (compress), which should exist in the system NTFS only and this property really is providing space from partition.



In the end of this table to illustrate the:-

►NTFS vs FAT :-

Criteria

NTFS5

NTFS

exFAT

FAT32

FAT16

FAT12

Operating System

Windows 2000
Windows XP
Windows 2003 Server
Windows 2008
Windows Vista
Windows 7

Windows NT
Windows 2000
Windows XP
Windows 2003 Server
Windows 2008Windows Vista
Windows 7

Windows CE 6.0
Windows Vista SP1
Windows 7
WinXP+KB955704

DOS v7 and higher
Windows 98
Windows ME
Windows 2000
Windows XP
Windows 2003 Server
Windows Vista
Windows 7

DOS
All versions of
Microsoft Windows

DOS
All versions of
Microsoft Windows


Limitations

Max Volume Size

264 clusters minus 1 cluster

232 clusters minus 1 cluster

128PB

32GB for all OS.
2TB for some OS

2GB for all OS.
4GB for some OS

16MB

Max Files on Volume

4,294,967,295 (232-1)

4,294,967,295 (232-1)

Nearly Unlimited

4194304

65536


Max File Size

264 bytes (16 ExaBytes)
minus 1KB

244 bytes (16 TeraBytes)
minus 64KB

16EB

4GB minus 2 Bytes

2GB (Limit Only
by Volume Size)

16MB (Limit Only
by Volume Size)

Max Clusters Number

264 clusters minus 1 cluster

232 clusters minus 1 cluster

4294967295

4177918

65520

4080

Max File Name Length

Up to 255

Up to 255

Up to 255

Up to 255

Standard - 8.3
Extended - up to 255

Up to 254


File System Features

Unicode File Names

Unicode
Character Set

Unicode
Character Set

Unicode
Character Set

System
Character Set

System
Character Set

System
Character Set

System Records Mirror

MFT Mirror File

MFT Mirror File

No

Second Copy of FAT

Second Copy of FAT

Second Copy of FAT

Boot Sector Location

First and Last Sectors

First and Last Sectors

Sectors 0 to 11
Copy in 12 to 23

First Sector and
Copy in Sector #6

First Sector

First Sector

File Attributes

Standard and Custom

Standard and Custom

Standard Set

Standard Set

Standard Set

Standard Set

Alternate Streams

Yes

Yes

No

No

No

No

Compression

Yes

Yes

No

No

No

No

Encryption

Yes

No

No

No

No

No

Object Permissions

Yes

Yes

Yes

No

No

No

Disk Quotas

Yes

No

No

No

No

No

Sparse Files

Yes

No

No

No

No

No

Reparse Points

Yes

No

No

No

No

No

Volume Mount Points

Yes

No

No

No

No

No


Overall Performance

Built-In Security

Yes

Yes

Yes
minimal ACL only

No

No

No

Recoverability

Yes

Yes

Yes
if TFAT activated

No

No

No

Performance

Low on small volumes
High on Large

Low on small volumes
High on Large

High

High on small volumes
Low on large

Highest on small volumes
Low on large

High

Disk Space Economy

Max

Max

Max

Average

Minimal on large volumes

Max

Fault Tolerance

Max

Max

Yes
if TFAT activated

Minimal

Average

Average

Thanks Eng eman
Please Share it! :)

0 التعليقات:

إرسال تعليق

elglaad

 
;