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Example: Online Restore of a Read-Only File (Simple Recovery Model)

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

This topic is relevant for SQL Server databases under the simple recovery model that contain a read-only filegroup. Under the simple recovery model, a read-only file can be restored online if a file backup exists that was taken since the file became read-only for the last time.

In this example, a database named adb contains three filegroups. Filegroup A is read/write, and filegroups B and C are read-only. Initially, all of the filegroups are online. A read-only file in filegroup B, b1, has to be restored. The database administrator can restore it by using a backup that was taken after the file became read-only. For the duration of the restore, filegroup B will be offline, but the remainder of the database will remain online.

Note Note

The syntax for an online restore sequence is the same as for an offline restore sequence.

To restore the file, the database administrator uses the following restore sequence:

RESTORE DATABASE adb FILE='b1' FROM filegroup_B_backup 
WITH RECOVERY

The file is now online.

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