Please clarify what is the "initial setup" you are referring to ?Is it re-install of data ontap?
Please be careful when you do any such activity and do take netapp technical support help before you do it.
Note that RLM is just the console port i.e you can watch the filer as it boots .It gives you a view one level below the usual ontap cli.RLM just replaces the console cable and give you inline access to the storage.
While connecting to the RLM IP - you can view the boot options and select any one of them (re-initialize the disks) is one of them.fyi.
Hope this helps
Balaji