1.master和media都是用的同一个安装包，安装前做好备份
2.安装过程中才会提示这台服务器是否为master，然后如果选n，再输入master的名称
而不是一开始就询问。。。掉坑了，删掉再装了一遍
Is client the master server? [y,n] (y) n
3.如果安装后master无法识别，重启master服务尝试能否识别
If this machine will be using a different network interface than the
default (logdb1), the name of the preferred interface should be used
as the configured server name. If this machine will be part of a
cluster, the virtual name should be used as the configured server name.
Would you like to use "beifen" as the configured
NetBackup server name of this machine? [y,n] (y) client
Would you like to use "beifen" as the configured
NetBackup server name of this machine? [y,n] (y) n
Enter the name of this NetBackup server: client
Is client the master server? [y,n] (y) n
What is the fully qualified name of the master server? master
Checking network connections.
TELEMETRY_UPLOAD value NO saved.
Sending SIGHUP to xinetd process.
Enter the Enterprise Media Manager server (default: master):
来源：https://www.cnblogs.com/yihr/p/12181884.html