Hello,This morning we discovered one of our databases was dismounted. We tried to mount the database but received an error stating the database was not shut down correctly (going by memory...) basically the database status was 'dirty shutdown'. Long story short I was able to salvage the database with the help of the Database Recovery Management analysis tool and life is back to normal.My question is what causes this? (Actually management would like to know what caused this?) The only thing I can find was in the System log :Cluster resource 'SGXX/DBXX (Mailserver)' in Resource Group 'Mailserver' failed. The actual database is under 80GB and we have plenty of diskpace so I know that’s not an issue.Any idea on what/where to look?

Hey,Can you tell me what is the version of Exchange 2003 ? Is it Std or Ent ?And Did you notice any other Application Error/warning event id's ?

Its Exchange 2007 Std.The only erros i can see are:Event Type: ErrorEvent Source: MSExchangeISEvent Category: General Event ID: 9646Date: 3/10/2010Time: 9:31:46 AMUser: N/AComputer: MAILDBSERVER2Description:Mapi session "/o=Domain/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=username" exceeded the maximum of 500 objects of type "objtFolderView". AndEvent Type: ErrorEvent Source: MSExchange Search IndexerEvent Category: General Event ID: 115Date: 3/10/2010Time: 9:36:47 AMUser: N/AComputer: MAILDBSERVER2Description:Mapi protocol handler encountered an unknown exception obtaining message content from : MDB 746c34a9-1a75-4ae6-a19e-669f4704f0d0, Mailbox 652db91b-4a51-44c0-b8e4-e7adbae9eb6b, DocumentID 150411, EntryID System.Byte[]. The exception is: Microsoft.Mapi.MapiExceptionNotFound: MapiExceptionNotFound: Unable to open property 0x37010102 (Interface 0000000c-0000-0000-c000-000000000046, Options 0) with flags ReadOnly. (hr=0x8004010f, ec=-2147221233)

Those 2 above errors shouldnt have caused that. I would follow up on that cluster error. Any power or 3rd party software problems?

Fine.. I don't think these event id's can cause a store to go down.!!