To reboot the FlashGrid server system:
Stop all running databases.
Reboot the FlashGrid server system. The following command will gracefully stop HAS, FlashGrid services and restarts the VM.
# flashgrid-node reboot
Wait until ASM is started:
[grid@myhostname ~]$ srvctl status asm ASM is running on myhostname
Start the databases stopped at step 1.