Since we upgraded to SQL Server 2012 about 12 months ago, we randomly hit upon a particular error when running a ProcessAdd against one of our dimensions. The error in question was: Microsoft.AnalysisServices.AdomdClient.AdomdErrorResponseException: File system error: The index data is damaged. Physical file: \?F:OLAPDataXYZ.0.dbMember.0.dim16.Id.Aggregate Member.fact.map.hdr. Logical file: .
