錯誤：對數據庫的備份、文件操作(如 ALTER DATABASE ADD FILE)以及加密更改必須序列化。請在當前備份或文件操作完成后重新發出該語句。
Shrink Database fails with Error “Backup, file manipulation operations”
In some cases users may get below error while trying to shrink their databases manually or using SQLServer management studio.
Executing the query "DBCC SHRINKDATABASE(N'OperationsManagerDW', 10, TR..." failed with the following error: "Backup, file manipulation operations (such as ALTER DATABASE ADD FILE) and encryption changes on a database must be serialized.
Possible reason:
The backup is running when user are trying to perform the database shrink. Please note that below operations may not be performed at the same time as a backup operation
• File management operations such as the ALTER DATABASE statement with either ADD FILE or REMOVE FILE clauses.
• The file truncation phase of shrink database or shrink file.
Please note that if backup is running and one of the above operations is attempted, then operation fails immediately. When user is trying to add or remove a file and if backups is started then backup will wait for a timeout period, then fail.
If user is trying to shrink database or file while a backup is running, the shrink stops without truncating the file. If backup started after shrink database operation then backup waits for shrink operation to complete.
Action:
Reissue the statement after the current backup or file manipulation operation is completed.
原文：http://www.sqlserver-expert.com/2012/02/shrink-database-fails-with-error-backup.html