var lastErr error
	for _, device := range devices {
		err := util.detachFCDisk(c.io, c.exec, device)
		if err != nil {
			klog.Errorf("fc: detachFCDisk failed. device: %v err: %v", device, err)
			lastErr = fmt.Errorf("fc: detachFCDisk failed. device: %v err: %v", device, err)
		}
	}
	if lastErr != nil {