Switching to hybrid kernel:
# /usr/sbin/normal-to-hybrid
Then Enable boot once in the server.
#echo “savedefault –default=0 –once” | grub –batch
Confirm whether the hybrid kernel is default 0 or not in grub.conf file
Then Reboot the server.
shuntdown -rf now
Once the server is up with New Hybrid Kernel, Change the Default kernel in grub.conf to Hybrid kernel.