Acronis diskeditor 6.0 User Manual
Bit 9-15 – year from 1980 ( 0-119 ).
1Ah
2
Primary cluster number.
1С
4
File size in bytes.
The figure above shows values already interpreted by the DiskEditor pro-
gram, these fields have the following values:
gram, these fields have the following values:
Name
File
name.
Ext/Prefix
File name extension or a number of a long name frag-
ment.
ment.
A, D, V, S, H, R
Represent Archive, Directory Entry Volume Label,
System, Hidden, Read-Only file attributes.
System, Hidden, Read-Only file attributes.
Size/Crc Valid
File size or a long name checksum.
Cluster
Number of the first file cluster.
Time
File creation time.
Create date
File creation date.
Reserved
Reserved
field.
Root folders in FAT16 file system have fixed sizes, locations, and contained limited
number of elements. FAT32 represents root folders like usual (sub) folders by a clus-
ter chain of any length. The number of entries in it – files and subfolders – is unlim-
ter chain of any length. The number of entries in it – files and subfolders – is unlim-
ited. The number of folder entries is unlimited as well, though it’s indirectly limited
by the maximum file (folder) name length counted off from the root folder.
3.5.4
Files with Long Names
Everything described above represents the classic way of describing files with
names in «8.3» format in FAT folder. But all Windows version after Windows
95, support long file names (up to 255 chars), allowing almost any chars in
Unicode encoding. This is handled by simply allocating not one, but several
adjacent 32-byte elements for each file in a folder. The number of elements
used for a long name depends on its length. The first several elements
contain a long name, followed by a usual element, with the structure
provided for a short name containing an uppercase file name. Elements with
parts in this long name are numbered one after another. The 01h element is
located just before the element with a short name. If one element with a
long name fragment is insufficient, another 02h element is used, etc. The
number of the last element is increased by 40h. If a long name takes one
element, its number will be 41h.
names in «8.3» format in FAT folder. But all Windows version after Windows
95, support long file names (up to 255 chars), allowing almost any chars in
Unicode encoding. This is handled by simply allocating not one, but several
adjacent 32-byte elements for each file in a folder. The number of elements
used for a long name depends on its length. The first several elements
contain a long name, followed by a usual element, with the structure
provided for a short name containing an uppercase file name. Elements with
parts in this long name are numbered one after another. The 01h element is
located just before the element with a short name. If one element with a
long name fragment is insufficient, another 02h element is used, etc. The
number of the last element is increased by 40h. If a long name takes one
element, its number will be 41h.
A folder record with a fragment of a long name has the following structure:
Offset, Length,
Purpose
bytes bytes
0
0
1
Element’s number.
1
10
Name (or its fragment).
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Chapter 3 : Main Window View Modes