| `minio_system_drive_free_bytes`                | Total storage free on a drive in bytes. <br><br>Type: gauge                             | `drive`, `set_index`, `drive_index`, `pool_index`, `server`        |

	poolIndexL  = "pool_index"
	setIndexL   = "set_index"
	driveIndexL = "drive_index"

	apiL = "api"

	sectorSize = uint64(512)
	kib        = float64(1 << 10)

	driveHealthOffline = float64(0)
	driveHealthOnline  = float64(1)
	driveHealthHealing = float64(2)
)

var allDriveLabels = []string{driveL, poolIndexL, setIndexL, driveIndexL}

const (
	driveUsedBytes               = "used_bytes"

			if !partNeedsHealing(dataErrsPerDisk[diskIndex]) {
				t.Errorf("Disk expected to be healed, driveIndex: %d", diskIndex)
			}
		} else {
			if disk == nil {
				t.Errorf("Drive erroneously filtered, driveIndex: %d", diskIndex)
			}
			if partNeedsHealing(dataErrsPerDisk[diskIndex]) {
				t.Errorf("Disk not expected to be healed, driveIndex: %d", diskIndex)
			}

		}
	}
}

func TestCommonParities(t *testing.T) {