The Basics : (Agent‑based PNs) Restart the onQ Service
  
(Agent‑based PNs) Restart the onQ Service
If the onQ Service is not running on the protected node, the HA cannot establish a secure connection to that protected node. Restarting the onQ Service during a backup or upgrade can cause backup/upgrade failures.
(Windows) To restart the service:
1. RDP to the PN.
2. Go to:
Start > Programs > Control Panel > Services
OR
Start > Administrative Tools > Services
3. Right-click on Quorum onQ Monitor (aka onQ Service), and choose Restart.
(Linux) To restart the service:
1. Verify that the service is installed:
> rpm -qa | grep node
2. Start the service:
> service dcrm-node start