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Q138853: PerfMon, Run Remotely, Fails to Show all Logical Drive Instances

Article: Q138853
Product(s): Microsoft Windows NT
Version(s): winnt:3.5
Operating System(s): 
Keyword(s): 
Last Modified: 08-AUG-2001

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The information in this article applies to:

- Microsoft Windows NT Workstation version 3.5 
- Microsoft Windows NT Server version 3.5 
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SYMPTOMS
========

When you connect to a Windows NT 3.5 computer remotely using Performance Monitor
(PERFMON.EXE), the number of Physical and Logical Disk instances may be
incorrect. One or more NTFS drives may be missing from the instance list
returned. This problem does not occur on systems with only FAT drives.

CAUSE
=====

When you connect to another system over the network, Performance Monitor
connects to the HKEY_Performance_Data registry key, which is handled by
Winlogon.exe. In Windows NT 3.5, Winlogon does not correctly impersonat the user
connecting to performance registry key. Even though the user running Performance
Monitor has the correct permissions to see the root of NTFS drive, that is, the
user could connect to the root directory and view the directory remotely,
Performance Monitor fails to return the drive instance and its performance
counters.

Winlogon uses the default accounts of the administrators group, domain users
group and Everyone. If none of these groups have read permissions to the root of
a drive, Performance Monitor fails to return the drive instance.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 3.5. This
problem was corrected in Windows NT Workstation or Server version 4.0.




Additional query words: prodnt 3.50 advapi32.dll

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Keywords          :  
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT350search kbWinNTW350 kbWinNTW350search kbWinNTSsearch kbWinNTS350 kbWinNTS350search
Version           : winnt:3.5

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