Make sure that all the physical hard drives are plugged in, turned on, and accessible. 2. If the issue persists, you can ...

1. Make sure that all the physical hard drives are plugged in, turned on, and accessible.
2. If the issue persists, you can run the Manage Storage Spaces task to reset the health status of the physical hard drives.

To run the Manage Storage Spaces task:

1. On the server dashboard, click the Storage tab, and then click Hard Drives.
2. Click on Advanced: Manage Storage Spaces task in the task pane.