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Microsoft KB Archive/105214

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Knowledge Base

Windows NT 3.1 to HP LM/X 1.4 Long Filename Problems

Article ID: 105214

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Advanced Server 3.1
  • Microsoft Windows NT Workstation 3.1
  • Microsoft Windows NT Advanced Server 3.1

This article was previously published under Q105214


Microsoft Windows NT 3.1 systems cannot see any files in a directory on a Hewlett-Packard (HP) LM/X 1.4 server if any file in the directory contains a period (or "dot") followed by more than seven characters. If you use the "dir" command to check the contents of the directory, you will receive the following message:

File Not Found.


HP LM/X 1.4 systems negotiate to Server Message Block (SMB) Specification Ext 2.0 (LAN Manager 1.x), which doesn't support long filenames. When speaking this down-level protocol, Windows NT 3.1 does not set bit 4 of Byte 9 of its SMBs. This bit is defined as follows:

   flags (smb_flg) bit 4:

   "When on, all paths sent to the server by the consumer are already in
   the canonicalized format used by OS/2. This means that file/directory
   names are in upper case, are valid characters and backslashes are used
   as separators."


A fixed, untested version of the RDR.SYS driver is available from Microsoft Product Support Services.

Keywords: kbhardware KB105214