DOCUMENT:Q290861 11-JUN-2002 [winnt] TITLE :No Error Message When Copying to Full Samba Volume PRODUCT :Microsoft Windows NT PROD/VER::4.0 OPER/SYS: KEYWORDS:kbinterop kbnetwork ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Workstation version 4.0 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base: Q256986 Description of the Microsoft Windows Registry SYMPTOMS ======== When you copy or move files from a Windows NT 4.0-based computer to a Samba server, the file may be truncated if the Samba server's hard disk is full or nearly full. This can also occur if the Samba server uses quotas and you would be exceeding the allocated disk space by having the file on the Samba share. The copy or move operation appears to succeed because Windows NT does not display any error messages; however, some data at the end of the file may be lost. CAUSE ===== This behavior occurs when the amount of free space on the Samba share is slightly smaller than the size of the file. In this scenario, Windows NT might not catch an error message that is sent near the end of the write operation. RESOLUTION ========== WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To resolve this behavior: 1. Install Service Pack 4 (SP4) or later on your computer, if you have not yet done so. 2. Start Registry Editor (Regedt32.exe). 3. Locate and click the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Rdr\Parameters 4. On the Edit menu, click Add Value, and then add the following registry value: Value name: UseWriteBehind Data type: REG_DWORD Value data: 0 5. Quit Registry Editor. If you set the UseWriteBehind value to 0, this disables the write-behind redirector optimization for write-only files. The default setting is to use the write-behind optimization. MORE INFORMATION ================ If you have not yet installed SP4 or later, you will receive the errors that are referred to in the following Microsoft Knowledge Base articles after you disable write-behind: Q169742 Semaphore Timeout Error When UseWriteBehind Disabled Q216795 Semaphore Error After Disabling Write Behind Caching Samba is an open-source software suite that provides file and print services to SMB/CIFS clients. REFERENCES ========== For more information about Samba, refer to the following Samba Web site: http://us1.samba.org/samba/samba.html The third-party contact information included in this article is provided to help you find the technical support you need. This contact information is subject to change without notice. Microsoft in no way guarantees the accuracy of this third-party contact information. The third-party products discussed in this article are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability. Additional query words: SMB SAMBA ====================================================================== Keywords : kbinterop kbnetwork Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : :4.0 Issue type : kbprb ============================================================================= 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 2002.