After details about the backup job are checked, it is found that the backup job uses a storage unit of the media server, as shown in Figure 1. (hdp3500e is an example of the media server's host name and the corresponding storage unit is stu-hdp3500e.)
Figure 1 Backup job information
After the hosts file of the media server is checked, the file does not contain the host name resolution of the client. Therefore, the backup job fails.