buf, err := json.Marshal(waitingDisks)
			if err != nil {
				return np, grid.NewRemoteErr(err)
			}
			return np, grid.NewRemoteErrString(string(buf))
		}
		if !dryRun {
			globalServiceSignalCh <- signal
		}
	case serviceFreeze:
		freezeServices()
	case serviceUnFreeze:
		unfreezeServices()
	case serviceReloadDynamic:
		objAPI := newObjectLayerFn()
		if objAPI == nil {