Microsoft KB Archive/161100

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File May Be Truncated When Copied to a Full Network Drive

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Q161100

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The information in this article applies to:


 * Microsoft Windows 95
 * Microsoft Windows 98

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SYMPTOMS
If you use Windows Explorer on a Windows-based computer to copy a file to an SMB (Server Message Block) server using the Microsoft Client for Microsoft Networks, the file may be truncated if the server's disk is full or nearly full.

The copy operation may seem to succeed, and no error message is displayed. However, some data at the end of the file may be lost.

CAUSE
This can occur if the amount of free disk space on the server is slightly less than the size of the file being copied.

RESOLUTION
To resolve this issue, make sure the disk on the network server contains sufficient free space for the file being copied.

A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp

NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal 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 should have the following file attributes or later.

Windows 95:

  File name    Version   Date     Size -  Vredir.vxd   4.00.958  7/23/96  140,403 bytes Shell32.dll 4.00.954  7/23/96  817,664 bytes Windows 98:

  File name   Size     Date      Time   Version ---  Vredir.vxd  165,461  08/13/99  02:36  4.10.2149

STATUS
Microsoft has confirmed this to be a problem in the Microsoft products that are listed at the beginning of this article.

MORE INFORMATION
If the operation being performed is a move operation instead of a copy operation, or if the original file is deleted after being copied, the lost data may not be recoverable except by restoring from a recent backup.

For additional information about issues resolved by updates to these components, please see the following articles in the Microsoft Knowledge Base:

Q183493 Batch File Calling CD Command May Not Run on HPFS

Q174371 Possible Database File Damage When Data Is Appended

Q172594 Cannot Connect to Server with 15 Characters and Period in Name

Q167712 Fatal Exception Error in VREDIR with DCOM Program

Q165403 Windows 95 Update Prevents Sending Clear-Text Password Over Net

Q165402 Windows 95 Update to Encrypt Passwords in Memory

Q160807 Cannot Connect to Windows NT Server with Many Shares

Q157114 "Access Denied" Attempting to Run File on LM/X Server

Q156497 Duplicate Print Output on PC-LAN Server from Windows 95 Client

Q152186 Possible Network Data Corruption If Locking Not Used

Q150215: Disabling Automatic Network Shortcut Resolution

Q148367 Possible Network File Corruption with Redirector Caching

Q142803 Locking Error or Computer Hangs Accessing Network Database Files

Q140558 Deleting Files on Samba Servers May Delete Local Files Instead

Q138249 Updated Vredir.vxd Corrects Errors Running Files on LMX

Q138014 File May Be Truncated to Zero Bytes When Copied Onto Itself

Q136834 Error Copying Read-Only Files to Core SMB Server

Q150215 Disabling Automatic Network Shortcut Resolution

Q138014 File May Be Truncated to Zero Bytes When Copied Onto Itself

Q136834 Error Copying Read-Only Files to Core SMB Server

"Q160807 Cannot Connect to Windows NT Server with Many Shares"

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

"Q161020 Implementing Windows 95 Updates" Additional query words:

Keywords : kbenv kbnetwork osr2 win95

Issue type : kbprb

Technology : kbWin95search kbWin98search kbWin95 kbWin98