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- DOCUMENT:Q95207 20-JUL-1993 [W_NT]
- TITLE :/A: Switch Added to FORMAT.COM
- 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:
-
- Microsoft has added an /A: switch to the FORMAT.COM file for
- Windows NT. This switch allows you to specify
- an NTFS volume's allocation unit size (cluster size).
-
- More Information:
-
- Using a larger allocation unit size speeds up bitmap searches and
- reduces external fragmentation, at the cost of greater internal
- fragmentation.
-
- The syntax of this switch is:
-
- /A:xxx
-
- where xxx may be 512, 1024, 2048, or 4096.
-
- The default for xxx is 512 bytes per allocation unit. In the retail
- release of Windows NT, the default allocation unit size will be a
- function of the disk size:
-
- 512 bytes for disks less than 512 MB
- 1024 bytes for disks from 512 MB to 1 gigabyte (GB)
- 2048 bytes for disks from 1 GB to 2 GB
- 4096 bytes for disks greater than 2 GB
-
- Additional reference words: 3.1
-
- =============================================================================
-
- THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
- PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
- ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
- OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
- EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
- ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
- CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
- MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
- POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
- OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
- SO THE FOREGOING LIMITATION MAY NOT APPLY.
-
- Copyright Microsoft Corporation 1993.