Thecus N8900 series User Manual page 107

Setup Secondary unit for HA, take example unit PMS (172.16.66.24):
xi. Login in to web UI of system 172.16.66.24 then go to "High Availability" HA
configuration page under Storage category.
xii. Click on "Enable" radio button then setting page will appear.
xiii. Choose the server role of associated system, we are having example to
have this unit as "Secondary Server". So "Secondary Server" has checked.
Then carry on to filled in associated "Primary Server" IP address.
xiv. Click "Detect" and the Secondary unit will start to check the Primary sever
status. If the Primary server has replied correctly then the message will
appear as below.
Please now check the Primary Server unit and the interactive message will
also appear to reboot both "Primary" and 'Secondary" server together to
complete High Availability settings.
The last state of Primary server is waiting for Secondary server as screen
shot below:
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