"SQL Server detected a logical consistency-based I/O error: torn page (expected signature: 0xaaaaaaaa; actual signature: 0x1004cd6e). It occurred during a read of page (1:1520237) in database ID 137 at offset 0x000002e64da000 in file 'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER2014\MSSQL\DATA\COMDAT.mdf'. Additional messages in the SQL Server error log or system event log may provide more detail. This is a severe error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online."