[Users] iso domain creation error

Hi, I ran engine-setup for ovirt 3.1fresh installation , while configuring iso domain i get this error: "Should the installer configure NFS share on this server to be used as an ISO Domain? ['yes'| 'no'] [yes] : yes Local ISO domain path: /iso Error: directory /iso is not empty" my /iso is a separate ext4 filesystem which has "lost+found" directory. I had to remove "lost+found" directory to get the iso domain created by engine-setup. Thanks, Jithin