Microsoft KB Archive/99753

= Microsoft Knowledge Base =

FastTips: MS-DOS 6.0 Backup/Miscellaneous Questions & Answers
Last reviewed: May 1, 1997

Article ID: Q99753

6.00 MS-DOS kbtool kbfile kbappnote

The information in this article applies to:


 * Microsoft MS-DOS operating system version 6.0

This article contains the complete text of the &quot;Backup and Miscellaneous Questions & Answers&quot; Application Note (PD0748) for MS-DOS 6.0.

You can obtain this Application Note from the following sources:

You can obtain this Application Note from the following sources:


 * Microsoft's World Wide Web Site on the Internet
 * The Internet (Microsoft anonymous ftp server)
 * Microsoft Download Service (MSDL)
 * Microsoft FastTips Technical Library
 * Microsoft Product Support Services

For complete information, see the &quot;To Obtain This Application Note&quot; section at the end of this article.

THE TEXT OF PD0748
Microsoft(R) Product Support Services Application Note (Text File) PD0748: BACKUP AND MISCELLANEOUS QUESTIONS AND ANSWERS Revision Date: 4/94 No Disk Included The following information applies to Microsoft MS-DOS(R), version 6.0 Upgrade.

| INFORMATION PROVIDED IN THIS DOCUMENT AND ANY SOFTWARE THAT MAY    | Q. My computer failed the Microsoft Backup compatibility
 * ACCOMPANY THIS DOCUMENT (collectively referred to as an Application |
 * Note) IS PROVIDED &quot;AS IS&quot; WITHOUT WARRANTY OF ANY KIND, EITHER     |
 * EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED     |
 * WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR      |
 * PURPOSE. The user assumes the entire risk as to the accuracy and   |
 * the use of this Application Note. This Application Note may be     |
 * copied and distributed subject to the following conditions: 1) All |
 * text must be copied without modification and all pages must be     |
 * included; 2) If software is included, all files on the disk(s)     |
 * must be copied without modification (the MS-DOS utility diskcopy is |
 * appropriate for this purpose); 3) All components of this           |
 * Application Note must be distributed together; and  4) This        |
 * Application Note may not be distributed for profit.                |
 * Copyright (C) 1993-1994 Microsoft Corporation. All Rights Reserved. |
 * Microsoft and MS-DOS are registered trademarks and Windows is a    |
 * trademark of Microsoft Corporation.                                |
 * trademark of Microsoft Corporation.                                |

test. What is causing this problem and how can I correct it? A. One or more of the following conditions may cause your computer to fail the Microsoft Backup compatibility test: - The floppy disk drive controller card does not support direct memory access (DMA). - A software or hardware compatibility problem exists (for      example, you are loading APPEND.EXE, POWER.EXE, or other       incompatible software). - You are using an incompatible third-party virtual device driver (VxD) in Windows. When loaded in the [386Enh] section of the SYSTEM.INI file, the following software VxDs can cause the Microsoft Backup for Windows(TM) compatibility test to fail: ABACKUP.386 CMSDTAPE.386 CMSTAPE.386 CMSTAPED.386 CPBVXD.386 FASTBACK.386 MYABU.386 VFD.386 VIRWT.386

For a complete list of possible failure causes and steps to      troubleshoot them, order FastTips Technical Library item Q97577, titled &quot;Your Computer Fails the Microsoft Backup Compatibility Test.&quot; Q. When I try to use Microsoft Backup for MS-DOS, I receive

the message &quot;DMA Buffer Size Too Small.&quot; How can I correct this problem? A. You can correct this problem by increasing the size of the direct memory access (DMA) buffer used by EMM386.EXE. To do      this, use the following steps: 1. Use an ASCII text editor, such as MS-DOS Editor, to open your CONFIG.SYS file. 2. Locate the EMM386.EXE command line. 3. At the end of the EMM386.EXE command line, add the following parameter: D=64 4. Save the CONFIG.SYS file, then quit the text editor. 5. Restart your computer. For more information about Microsoft Backup for MS-DOS, refer to the &quot;Managing Your System&quot; chapter in the &quot;Microsoft MS-DOS 6 User's Guide.&quot;

Q. When I try to use Microsoft Backup for Windows, I receive

the message: &quot;DMA Buffer Size Too Small.&quot; How can I correct this problem? A. You can correct this problem by increasing the size of the DMA buffer used by the extended memory manager and then modifying your system initialization file (SYSTEM.INI). To do this, use the following steps: 1. Use an ASCII text editor, such as MS-DOS Editor, to open your CONFIG.SYS file. 2. Locate the EMM386.EXE command line. 3. At the end of the EMM386.EXE command line, add the following parameter: D=64 4. Save the CONFIG.SYS file, then quit the text editor. 5. Use an ASCII text editor to open your SYSTEM.INI file, which is located in your Windows directory. 6. Locate the [386Enh] section and add the following line after the section heading: DMABuffersize=64 7. Save the changes to the SYSTEM.INI file, then quit the text editor. 8. Quit Windows if you haven't already done so, and restart your computer. For more information about Microsoft Backup for Windows, please refer to the &quot;Managing Your System&quot; chapter in the &quot;Microsoft MS-DOS 6 User's Guide.&quot;

TO OBTAIN THIS APPLICATION NOTE
You can find by.SEA, a self-extracting file, on the following services:

  Microsoft's World Wide Web Site on the Internet On the www.microsoft.com home page, click the Support icon. Click Knowledge Base, and select the product. Enter kbfile by.SEA, and click GO! Open the article, and click the button to download the file.   Internet (anonymous FTP) ftp ftp.microsoft.com Change to the Softlib/Mslfiles folder. Get by.SEA   Microsoft Download Service (MSDL) Dial (425) 936-6735 to connect to MSDL Download by.SEA 

For additional information about downloading, please see the following article in the Microsoft Knowledge Base:

ARTICLE-ID: Q119591 TITLE    : How to Obtain Microsoft Support Files from Online Services You can have this Application Note mailed or faxed to you from the automated Microsoft FastTips Technical Library, which you can call 24 hours a day, 7 days a week at (800) 936-4200. NOTE: The FastTips Technical Library is available only to customers within the U.S. and Canada.

If you are unable to access the source(s) listed above, you can have this Application Note mailed or faxed to you by calling Microsoft Product Support Services Monday through Friday, 6:00 A.M. to 6:00 P.M. Pacific time at (425) 646-5104. If you are outside the United States, contact the Microsoft subsidiary for your area.