After UltraPath 21.1.2 had been installed in RHEL 7.2, the system displayed a message "unable to detect UltraPath device node" when the upadmin command was executed. Commands such as upadmin show path could not be used.
However, the output of the rpm -qa |grep Ul command showed that UltraPath had been installed.
unable to detect UltraPath device node
1. After the service nxup start command was executed, UltraPath could be used normally.
2. After the host was restarted, UltraPath became unavailable again.
3. A remote check showed that the /etc/systemd/system/sysinit.target.wants/ directory was missing.
4. After the directory was manually created and the host was restarted, UltraPath became normal.
The /etc/systemd/system/sysinit.target.wants/ directory was missing.
Manually create the /etc/systemd/system/sysinit.target.wants/ directory and restart the device.