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WINS Log Files

Some of my servers are running out of space on the disk system because WINS is creating a lot of log files under SYSTEM32 directory. Those files are named J50?????.LOG and they have 1MB each.
Any idea why those files are being created?
1 Solution
I think you will find the answer to your problem here.

Both Dhcp and wins create these files as temporary files or backup files in case the wins or dhcp database should become corrupted, or stop and restart. You will find these file in the system32\wins or dhcp folder, they are needed for wins or dhcp to function as they are apart of the Ms Jet engine.

Here is a Ms document to confirm this

Jetpack/WINADMIN Create Maintenance Files in System32
Last reviewed: August 24, 1998
Article ID: Q190573
The information in this article applies to:
Microsoft Windows NT Server version 4.0
Microsoft Windows NT Server, Enterprise Edition version 4.0

Your Windows Internet Name Service (WINS) Server may start to accumulate log files (J50.log or J50.chk) in various directories other than the %SystemRoot%\System32\WINS directory, and may keep the WINS service from starting. It is normal for these files to be present in the %SystemRoot%\System32\WINS directory, but should not appear in any other directories.

This issue can be caused by either of the following:

- Running Jetpack.exe from the wrong directory.

   The Jetpack executable resides in the %SystemRoot%\System32 directory.
   It is a common mistake to run this utility from the
   %SystemRoot%\System32 directory as follows:

      c:\winnt\system32\Jetpack.exe winnt\system32\WINS WINS.MDB TMP.MDB

   Jetpack.exe, in this instance, will place its logs in the
   %SystemRoot%\System32 directory.

   For additional information on running Jetpack.exe, please see the
   following article in the Microsoft Knowledge Base:

      ARTICLE-ID: Q145881
      TITLE     : How to Use Jetpack.exe to Compact a WINS or DHCP Database

In WINS Administrator, the Enable Logging check box is not selected.
If the Enable Logging configuration option has been cleared in WINS Manager, when the WINS service starts, it will create the J*.log files in the %SytemRoot%\System32 directory and will not allow the files to be removed.

To resolve this issue, perform on of the following series of steps:

If the WINS service is not starting, move the offending files to the %SystemRoot%\System32\WINS directory, and then restart the WINS service.

If the service is using the files and you cannot delete them:
1. Click on Start, go to settings, and click Control Panel.

2. Double-click the Services icon.

3. Select the Windows Internet Name Service and click the Stop Button.

4. Back up the WINS data using the Backup Database function in WINS

5. Remove any offending files and restore data back into directory.

6. Run Jetpack.exe from within the %SytsemRoot%\System32\WINS directory.

7. Restart the WINS service.

8. In WINS Manager, click Server, select Configuration, and then click

9. Click to select the Logging Enabled check box.

      NOTE: If the Logging Enabled check box is cleared, automatic backup
      will not occur.

Microsoft has confirmed this to be a problem in Windows NT Server version 4.0. We are researching this problem and will post additional information here in the Microsoft Knowledge Base as it becomes available.
Good Luck
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