mount nfs with root privileges

I'm trying that server A backs up server B mounting B via NFS. But, to copy completely all files, server A needs to access server B with root privileges. So far, I have used the option no_squash_root but server A still can't copy files only readable by owner (chmod 600). What I have to do to backu

mount nfs with root privileges

I'm trying that server A backs up server B mounting B via NFS. But, to copy completely all files, server A needs to access server B with root privileges. So far, I have used the option no_squash_root but server A still can't copy files only readable by owner (chmod 600). What I have to do to back