func (s *xlStorage) GetDiskID() (string, error) {
	s.RLock()
	diskID := s.diskID
	fileInfo := s.formatFileInfo
	lastCheck := s.formatLastCheck

	// check if we have a valid disk ID that is less than 1 seconds old.
	if fileInfo != nil && diskID != "" && time.Since(lastCheck) <= 1*time.Second {
		s.RUnlock()
		return diskID, nil
	}
	s.RUnlock()

	fi, err := s.checkFormatJSON()
	if err != nil {

	for poolIdx := range z.serverPools {
		format := z.serverPools[poolIdx].format
		for setIdx, set := range format.Erasure.Sets {
			for i, diskID := range set {
				if diskID == id {
					return poolIdx, setIdx, i, nil
				}
			}
		}
	}
	return -1, -1, -1, fmt.Errorf("DriveID(%s) %w", id, errDiskNotFound)
}

const (
	vmware = "VMWare"

		case err != nil && err != test.expError:
			t.Errorf("Test %d: Expected error: %v, but got: %v", i, test.expError, err)
		}
	}
}

// TestXLStorageFormatFileChange - to test if changing the diskID makes the calls fail.
func TestXLStorageFormatFileChange(t *testing.T) {
	volume := "fail-vol"
	xlStorage, _, err := newXLStorageTestSetup(t)
	if err != nil {