Article ID: 818396
Article Last Modified on 1/29/2007
APPLIES TO
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Service Pack 3
- Microsoft Windows 2000 Service Pack 3
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Service Pack 4
- Microsoft Windows 2000 Professional Edition
SYMPTOMS
On a Microsoft Windows 2000-based computer, when you perform a file operation to a down-level (non-Microsoft Windows NT-based) server that is running a server message block (SMB) service, for example an OS/2 Warp 4 server, the file operation may take approximately 35 seconds or longer to complete.
For example, this problem may occur when you open a file or when you modify file attributes on the down-level server.
Also, overall computer performance may decrease when your Windows 2000-based computer accesses files on the down-level server.
This problem may occur after you do one or both of the following:
- Install Microsoft Windows 2000 Service Pack 3 (SP3).
- Install the fix that is described in the following Microsoft Knowledge Base article:
301952 Slow performance when you access files on servers
CAUSE
This problem occurs when a total file lock (oplock) is sent to the client that issued the request, and the client does not answer. As a result, the server waits for the oplock timeout to occur. On an OS/2 server, the minimum break oplock timeout is 35 seconds.
RESOLUTION
Part 1: Download and Install the Update
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows 2000 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name -------------------------------------------------- 04-Jun-2003 17:18 5.0.2195.6752 407,792 Mrxsmb.sys 04-Jun-2003 17:18 5.0.2195.6752 168,496 Rdbss.sys
Part 2: Turn Off Opportunistic Locking
After you install this update on a Windows 2000-based computer, turn off opportunistic locking. To do this, follow these steps:
- Quit all Windows 2000 programs.
- Click Start, and then click Run.
- In the Open box, type regedit and then click OK.
- Locate, and then select the following key in the Windows registry:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MrXSmb\Parameters\ - On the Edit menu, point to New, and then click DWORD Value.
- Type OplocksDisabled, and then press ENTER.
- Right-click OplocksDisabled, and then click Modify.
- In the Value data box, type 1, and then click OK.
- On the Registry menu, click Exit.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
296264 Configuring opportunistic locking in Windows
For more information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the following article number to view the article in the Microsoft Knowledge Base:
265173 The Datacenter Program and Windows 2000 Datacenter Server product
Additional query words: oplocks opportunistic lock locking OS2 samba lanman21 slow server HPFS386 file system GetExtendedAttributes
Keywords: kbbug kbfix kbqfe kbhotfixserver KB818396
