<%= number_f f, :disk_size_gb,
             {
               :class    => "col-md-2",
               :label    => _("Size (GB)"), :label_size => "col-md-2",
               :required => true
             }
%>

<%= checkbox_f f, :account_type, {
    :label => _("Premium Disk"), :label_size => "col-md-2"},
               'true',
               'false'
%>

<%= selectable_f f, :data_disk_caching, %w(None ReadOnly ReadWrite),
                 { },
                 {
                     :label    => _('Data Caching'),
                     :required => true,
                     :class    => "col-md-2"
                 }
%>