In some instance SSO tape will go to partially down state for a particular media server. We cannot bring up the drive through CLI or by right click the drive in topology console. Follow the below steps.
1)Try to restart the netbackup service in the media server and re-configure the devices.
2) Note the affected drive name from device monitor on the left panel.
Then expand device tab and select drives option.
There select the appropriate drive and right click on it.
Click on the change option and remove the host which is having the missed path issue. Again click the add button and select the removed media server.
And in new path information select the browse tab. It will get the new avaliable path to the SSO drive.
The drive will also come to up state.