Article ID: 835601 - View products that this article applies to.
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In Microsoft Windows NT 4.0, when you use Windows Explorer to copy a folder that contains many subfolders and files from a remote share to another location, some of the subfolders and files may not be copied.
This problem occurs when you use a Win32 program, such as Windows Explorer, to copy a folder with many subfolders and files over a slow network.
When a Win32 program uses the FindFirstFile function to retrieve a list of files on a remote share, Windows Redirector (Rdr.sys) issues a Search Transact Server Message Block (SMB) command on the remote share. A list of files and folders is returned from the remote share, and Windows Redirector stores the list in the Search Control Block (SCB) search buffer.
Only the first part of the files and folders list is copied to the FindNextFile user mode buffer. (The FindNextFile user mode buffer is associated with the FindFirstFile handle.) When the Win32 program queries this part of the list, the Windows Redirector Rdr!CopyIntoSearchBuffer function copies the next part of the list to the user mode buffer. The function checks that the SCB search buffer is not too old. (If the folder on the remote share is very large, the folder will take a long time to load.) If the SCB search buffer was loaded a long time ago, the function flags the SCB search buffer, and then the function fails and updates to a STATUS_PENDING state. The Rdr!CopyIntoSearchBuffer function then reissues a call to the server to retrieve the remaining file list. However, the ResumeName pointer points to the next file name that is expected by the Win32 program (in the SCB search buffer) and not to the actual last file name that was viewed by the Win32 program.
Hotfix informationA supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
PrerequisitesBecause of file dependencies, this hotfix requires Microsoft Windows NT 4.0 Service Pack 6a.
Restart requirementsYou must restart your computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace any other hotfixes.
File informationThe English version of this hotfix 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 -------------------------------------------------------------- 28-Jan-2004 13:22 4.0.1381.7261 266,256 Rdr.sys
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.