Migrate ZCS5 x86 to ZCS7 x64

Hello

I'm new to the forum and would like your help,

I have a big problem on their hands,

I have a production server that's running CentOS 5.5 and ZCS 5
I have 300 boxes and 235GB

I need to migrate to a new server, preferably a Centos ZCS 6 and 7

I would like you to help us to know how best to do this.

I would not change the server that is in production, it is a very critical service here in the company.

I await your help.