Could not start ArcSDE - Check Network, $SDEHOME disk, DBMS settings....




Today, I created multiple ArcSDE service instances and few services deletion.   When I started one of the service, it has thrown an error "could not start ArcSDE..." for the command sdemon -o start -i esri_sde.  

Then I tried with sdemon -o start -i esri_sde -H c:\arcgis\arcsde\ora10gexe\.  It started properly. I am not sure whether the deletion of the service instance esri_sde has not done properly...