you need to have access to Dell Support

here the link

https://www.dell.com/support/kbdoc/en-mx/000185734/end-of-life-documents

documents will be displayed:

• Hardware Release and End of Service Life
• Software Release and End of Service Life
• Operating Environment Software Release and End of Service Life

 

ProductPlatform                  Name                                                RTS Date                       EOL DateEOSS Date

Data Domain

DD6300 Appliance

19-Oct-2016

It does not have EOL published yet