There are three different power down procedures depending on your array configuration  [URL]  [URL]  [URL]  You can find the power off procedures by going to the EMC support page and do a search for "How do I power off VNX xxxx"  glen      
Hi Everyone,   I am working with a old EMC VNX300, and i need safely shutdown, and i need know how can i upgrade to a last version of VNX5300.
emc VNX5300 S/N ckm00133800004 how to shutdown from GUI