I've been getting this error below all the time regarding the VSS backup error in the event viewer, eventhough the VSS Writer status got no error in the cmd prompt.
and also Symantec Backup Exec 2010 R2 agent got error in backup the farm using the DOMAIN\SPService username which is the owner of this WSS_ContentDB and also member of the Farm admin group.
Log Name: ApplicationSource: Windows SharePoint Services 3Date: 8/09/2010 10:11:31 PMEvent ID: 3760Task Category: DatabaseLevel: ErrorKeywords: ClassicUser: N/AComputer: MOSSDEV01.domain.comDescription:SQL Database 'SharePoint_AdminContent_f632e5bf-cbd9-4d9f-a819-1811feb4f2b6' on SQL Server instance 'MOSSDEV01\MOSSDB' not found. Additional error information from SQL Server is included below.Cannot open database "SharePoint_AdminContent_f632e5bf-cbd9-4d9f-a819-1811feb4f2b6" requested by the login. The login failed.Login failed for user 'DOMAIN\Administrator'.
Log Name: ApplicationSource: VSSDate: 8/09/2010 10:08:52 PMEvent ID: 12289Task Category: NoneLevel: ErrorKeywords:
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