By reboot the service is not started
 

I've created a service and I can use the svcadm to start and to stop it.

Now I stop it and reboot the machine and hope by rebooting it will be restarted. But it doesn't.

What could be the reason?

I think maybe I should keep the service started before I reboot the machine? Or in other words, if the service is stopped (disable) before reboot, it will not be restarted by rebooting?

There is no start or stop service commands but enable or disable. If you disable a service, it won't be started at reboot for obvious reasons.