Continued from previous post... For a fuller discussion see STARTUP and SHUTDOWN - normal and what to do if it fails - all models: [URL]#M115   We welcome questions and contributions from all.   If you found this useful please give KUDOS to help others find the information also. thanks
The guide helps in providing a clear procedure to properly shutdown the DP4400 appliance. Link for the guide : support.emc.com/kb/522645  
How to shut down DP4400