| Event Id | 1646 |
| Source | NTDS Database |
| Description | The Windows Directory Service database has 121 MB of free space out of 130 MB of allocated space. |
| Event Information | According to Microsoft: CAUSE: In some scenarios, inefficiencies in the Microsoft Jet database engine cause space to be allocated that is not reused and cannot be reclaimed by an offline defragmentation. Additionally, the offline defragmentation process may cause additional space that is not reclaimed to be allocated. RESOLUTION : To resolve this issue, install Windows 2000 Service Pack 3 (SP3) and then run the offline defragmentation again. |
| Reference Links | Offline defragmentation increases the size of the Ntds.dit file Performing Offline Defragmentation of the Active Directory Database Distributed Link Tracking on Windows-based domain controllers |
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