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- DOCUMENT:Q92517 24-SEP-1993 [W_NT]
- TITLE :Small Data File May Be Stored in NTFS Header Area
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- ------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- ------------------------------------------------------------------
-
- Summary:
-
- The NT File System (NTFS) file header contains general file
- information and a list of attribute pairs. An attribute pair is an
- attribute header and either the attribute information or a pointer to
- the attribute information. Some examples of attributes are a data
- stream, an alternate data stream, security, and extended attributes.
-
- More Information:
-
- An NTFS header resembles the following:
-
- file info | attribute pair | attribute pair | attribute pair...
-
- If an individual attribute's data is too large, a pointer to the
- attribute's data is stored in the header rather than the data itself.
- If there are too many of these attribute pairs, then none of the
- attribute's data is stored in the header. In that case, pointers will
- be used to point to the attribute's data.
-
- If the file is small enough and there is enough room in the NTFS
- header, the file can be placed directly in the NTFS header because the
- file data is regarded as an attribute. In a best-case scenario, if
- file data is the only attribute, then about 1 kilobyte (K) of file
- data can be fit into the header as attribute information.
-
- Additional reference words: win32 Eas ea
- KBCategory:
- KBSubCategory: FILSYS
-
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- Copyright Microsoft Corporation 1993.