Large Files Copy Slowly from a Macintosh Computer to a Windows Server 2003-based Computer That Is Running Services for Macintosh (823356)


The information in this article applies to:

  • Microsoft Windows Server 2003, Standard Edition
  • Microsoft Windows Server 2003, Enterprise Edition

SYMPTOMS

When you copy a large file from a Macintosh computer to a Microsoft Windows Server 2003-based computer that is running Services for Macintosh, the file copies slowly.

CAUSE

This issue may occur if Windows Server 2003 does not send the final Reply-DSI-Write signal during the transfer of each data block. The Macintosh computer must wait for this signal before it can send more data. When the Macintosh computer does not receive this signal, it waits for about 50 milliseconds, and then it sends an ACK signal to the Window Server 2003-based computer. The ACK signal causes Windows Server 2003 to send the Reply-DSI-Write signal, and the file copy continues. When you copy a large file, these delays add up and increase the time it takes to copy the file.

RESOLUTION

Hotfix Information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it 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 Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, 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:

http://support.microsoft.com/contactus/?ws=support

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.

File Information

The English version of this 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   Platform
   ---------------------------------------------------------------
   20-Jun-2003  18:47  5.2.3790.65   156,160  Sfmsrv.sys  x86
   20-Jun-2003  18:47  5.2.3790.65   466,944  Sfmsrv.sys  ia64

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MinorLast Reviewed:10/27/2005
Keywords:kbHotfixServer kbQFE kbBug kbfix kbQFE kbWinServ2003preSP1fix KB823356 kbAudITPRO
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