Define default storage

Hi,

I'm looking how to define the default storage for a ProxMox host. To be more precise i don't want the Proxmox host use the local storage by default but an NFS storage.

This is not a problem when i manually create a new CT with the web interface (i just have to choose the NFS storage) but the problem occur when i migrate some CT from another OpenVZ server (with vzmigrate) : ProxMox put it by default on the local storage ... . I try to remove the local storage (on ProxMox) as to keep only the NFS storage (and get it as the default) but it's seem impossible to remove ...

Thanks in advance for your help !

/Xavier