Event ID - 10006

Event Id10006
SourceMicrosoft Search
DescriptionAn error occurred during the online operation for instance [Your instance here]: 8000ffff - Catastrophic failure
Event InformationCAUSE :
During system shutdown, it may happen that the Content Indexing service was shut down prior to the Cluster service. If this happens, the Content Indexing full-text resources correctly fail, then the Cluster service attempts to restart. However, it cannot restart because the Content Indexing service is shutting down. 
WORKAROUND :
It is not actually a catastrophic failure. The workaround is to simply wait for everything to shut down successfully, then restart services if necessary. 
STATUS :
Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.
Reference Links Content Indexing Logs Catastrophic Error When Shutting Down

SQL Server 2000 Fails to Install on a Cluster If Service Startup Account Contains a Space

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