The "Failed to unmount the file system" Message Is Displayed After the Recovery Plan Is Executed If the Production Data of the SQL Server Cluster Resides on Different Partitions of a LUN

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1.You are advised to Install the latest patch of Microsoft Windows 2012.
2.Restart Microsoft Windows 2012 and execute the recovery plan.

Other related questions:
During the Data Clearance for a Recovery Plan of an SQL Server Protected Group, a Message Is Displayed Stating Failed to execute the script After the Database Is Stopped
Check whether the database is locked. If the database is locked, unlock it and clear its data again.

During the Data Clearance for a Recovery Plan of an SQL Server Protected Group, a Message Is Displayed Stating Failed to execute the script When the Database Is Stopped
Check whether the database is locked. If the database is locked, unlock it and clear its data again.

Message Failed Is Displayed in the Back up application data or Delete application data backup Step and No Execution Detail Is Displayed When Planned Migration or Fault Recovery Is Executed
The failure in the Back up application data or Delete application data backup step does not affect disaster recovery services. The execution result can be ignored.

Introduction to recovery plan tests executed by the OceanStor ReplicationDirector
You can test a recovery plan to verify the availability of the data replicated to the disaster recovery site. During a test, the disaster recovery site generates test data using snapshots, which does not have any impact on the production site. After the test is complete, the test environment must be cleaned up. Before a failover or planned migration, at least one recovery plan test must be executed successfully. The test can be performed only in the disaster recovery management system at the disaster recovery site.

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