fsDir := host.GetPluginDir(iscsiPluginName)
	countFS, err := getVolCount(fsDir, portal, iqn)
	if err != nil {
		klog.Errorf("iscsi: could not determine FS volumes in use: %v", err)
		return true
	}

	blockDir := host.GetVolumeDevicePluginDir(iscsiPluginName)
	countBlock, err := getVolCount(blockDir, portal, iqn)
	if err != nil {

			portal:  "127.0.0.1:3260",
			iqn:     "iqn.2003-01.io.k8s:e2e.unknown",
			count:   0,
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			count, err := getVolCount(tc.baseDir, tc.portal, tc.iqn)
			if err != nil {
				t.Errorf("expected no error, got %v", err)
			}
			if count != tc.count {
				t.Errorf("expected %d volumes, got %d", tc.count, count)
			}
		})
	}