Root directory structure FAT NTFS file system description computer boot records hard disk drive sectors files cluster volume label DIR command DOS track configuration

 
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Root Directory entry

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The Size of File and starting cluster of file may be a valuable resource for data recovery in recovering damaged files since we can calculate how many clusters the file is supposed to consist of.

The Figure given before shows the Root Directory entry for seven Different files. The encoding for these entries has been given in the following table:

Encoding For Filename, Extension, Attribute, Starting Cluster and File Size

Filename

Extension

Attribute

Starting Cluster

Size of File in Bytes

 

THISIS1

 

TXT

20H
= 00100000B
= Archive
(The 6th bit is Set)

03H, 00H
(Read As 00H, 03H To Calculate the Starting Cluster)
= 0003H
= 3

1EH, 00H, 00H, 00H
(Read As 00H, 00H, 00H, 1EH to Calculate File Size)
= 0000001EH
= 30 Bytes

THISIS

TXT

00H
=00000000B
=No Attribute
(No Bit is Set)

02H, 00H
= 0002H
= 2

1EH, 00H, 00H, 00H
= 0000001EH
= 30 Bytes

THISIS2

TXT

01H
=00000001B
= Read-Only

04H, 00H
= 0004H
= 4

1EH, 00H, 00H, 00H
= 0000001EH
= 30 Bytes

THISIS3

TXT

02H
= 00000010B
= Hidden-File

05H, 00H
= 0005H
= 5

1EH, 00H, 00H, 00H
= 0000001EH
= 30 Bytes

3THISIS

TXT

03H
= 00000011B
= Hidden-File  + Read-Only

07H, 00H
= 0007H
= 7

1EH, 00H, 00H, 00H
= 0000001EH
= 30 Bytes

2THISIS

TXT

03H
= 00000011B
= Hidden-File  + Read-Only

06H, 00H
=0006H
=6

1EH, 00H, 00H, 00H
= 0000001EH
= 30 Bytes

4THISIS

TXT

23H
= 00100011B
= Hidden-File
+ Read-Only
+ Archive

08H, 00H
=0008H
=8

1EH, 00H, 00H, 00H
= 0000001EH
= 30 Bytes

 

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