Simpana client fails to perform backup, view the status of the task. It reported the following error "library, mediaAgent, Drive pool, Meida: mount path is offl...

Simpana client fails to perform backup, view the status of the task. It reported the following error "library, mediaAgent, Drive pool, Meida: mount path is offline.Advice: please check if the mountpath is online adn accessible ".What may can be the cause of this problem?

A. Client offline B. Media Services Offline C. The client cannot resolve the media server host name D. backup media failure