Varying a Volume Online

To make a disk volume available to the server for use as a database, recovery log, or storage pool volume, select the appropriate value and then click Finish, or click Cancel to end this task.

Wait for Completion

Specify whether to wait for the server to complete processing this command in the foreground.

Yes Specifies that the server processes this command in the foreground. Yes is the default.
No Specifies that the server processes this command in the background.