Next, you need to create a new compacted copy of ntds.dit in a new location. (First verify that the target volume has sufficient available disk space for the compacted database. The Compact command will create the specified folder if it doesn't already exist). To do so, type
compact to c:\mydir
Quit Ntdsutil, then replace the current ntds.dit file with the new compacted version, delete any .log files in the active AD database location, and reboot the server. (For additional information about AD defragmentation, see the Microsoft article "Performing Offline Defragmentation of the Active Directory Database" at http://support.microsoft.com/support/kb/articles/q232/1/22.asp.)
I've modified a value under the Server service's registry subkey on my Windows NT Server system. As Microsoft warns, the modification disabled autotuning. Microsoft doesn't, however, provide information about how to reset the feature, except for reinstalling the OS. How can I restore the autotuning functionality to the Server service?
If you enter any custom values under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters subkey, the system disables autotuning of Server service performance by default. (The system will also disable autotuning if you use the Net Config command with the /hidden, /srvcomment, or /autodisconnect switches because using them exposes all the possible subkey values.) Disabling autotuning creates a problem when you want to add or remove memory. If you add or remove memory while autotuning is disabled, NT can't dynamically adjust this subkey's values to reflect the new amount of memory.
To restore server autotuning, you need to delete some values under the Parameters subkey. Delete all values except EnableSharedNetDrives, Lmannounce, NullSessionPipes, NullSessionShares, and Size. (If some of these values don't exist, you don't need to add them.)
Before you make any modifications to this subkey, I highly recommend that you perform a full system backup that includes the registry. Simply open the regedit registry editor and select Registry, Export Registry File while the Parameters subkey is selected. Then, save the subkey's data to a .reg file so that you can easily restore the subkey by double-clicking it and answering Yes to enter it in the registry.
After you restore the subkey values and perform a reboot, the system will restore the Server service's autotuning functionality. Figure 1 and Figure 2 show the LanmanServer registry subkey before and after modification, respectively. For more information about the Server service, see the Microsoft article "Server Service Configuration and Tuning" (http://support.microsoft.com/support/kb/articles/q128/1/67.asp).
A side effect of the Net Config Server /hidden:yes/no command (which hides or exposes a server in the network browse list) is that it exposes static values for the autotuned LanmanServer subkey values. You can manually hide a server by setting the hidden value (of type REG_DWORD) to 1.
I use Windows 2000's built-in Backup utility to create Emergency Repair Disks (ERDs) for my Win2K systems. I've noticed that Backup isn't updating the files in the \%systemroot%\repair folder on several systems. Can you explain this behavior?
The problem is a bug in Win2K Backup's ERD-creation process. If a system's \%systemroot%\repair folder is empty (because you moved or deleted its files) when the process is launched, the bug prevents the creation of hard disk—based copies of the registry files and the 3.5" ERD. To complete the ERD creation process, you might need to restore the registry files to the \repair folder temporarily—using a backup copy you made from that system or a copy from another system.
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