Slow Performance When You Access Files on Servers (301952)

The information in this article applies to:

Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional SP2

This article was previously published under Q301952

SYMPTOMS

Performance may be adversely affected when your Windows 2000-based computer accesses files on a server that is running an earlier version of Windows, or non-Microsoft Windows NT-based server (such as Microsoft Windows 98-based clients with file sharing enabled, or Samba Servers).

Specifically, programs that access files across the network may not benefit from the performance advantage of using opportunistic locks. Please refer to the "More Information" section of this article.

CAUSE

This problem can occur because when a file is opened on a server that is running an earlier version of Windows, the redirector does not set the proper flags to request opportunistic locking in an OpenAndX SMB.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix should have the following file attributes or later:

   Date         Time   Version        Size     File name
   ------------------------------------------------------
   09-Jul-2001  15:31  5.0.2195.3835  369,168  Mrxsmb.sys
   09-Jul-2001  15:31  5.0.2195.3835  131,792  Rdbss.sys

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

MORE INFORMATION

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

For additional information about oplocks, click the article number below to view the article in the Microsoft Knowledge Base:

129202 Explanation of Opportunistic Locking on Windows NT

Modification Type:	Minor	Last Reviewed:	9/26/2005
Keywords:	kbHotfixServer kbQFE kbbug kbenv kbfix kbnetwork kbOSWin2000fix kbWin2000PreSP3Fix kbWin2000sp3fix KB301952