| `minio_api_requests_rejected_header_total`     | Total number of requests rejected for invalid header. <br><br>Type: counter    | `type`, `pool_index`, `server`               |
| `minio_api_requests_rejected_timestamp_total`  | Total number of requests rejected for invalid timestamp. <br><br>Type: counter | `type`, `pool_index`, `server`               |

// If the tracker has been deleted an error is returned.
func (h *healingTracker) update(ctx context.Context) error {
	h.mu.Lock()
	if h.ID == "" || h.PoolIndex < 0 || h.SetIndex < 0 || h.DiskIndex < 0 {
		h.ID, _ = h.disk.GetDiskID()
		h.PoolIndex, h.SetIndex, h.DiskIndex = h.disk.GetDiskLoc()
	}
	h.mu.Unlock()
	return h.save(ctx)
}

		switch msgp.UnsafeString(field) {
		case "ID":
			z.ID, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "ID")
				return
			}
		case "PoolIndex":
			z.PoolIndex, err = dc.ReadInt()
			if err != nil {
				err = msgp.WrapError(err, "PoolIndex")
				return
			}
		case "SetIndex":
			z.SetIndex, err = dc.ReadInt()
			if err != nil {
				err = msgp.WrapError(err, "SetIndex")
				return
			}

	for _, disk := range si.Disks {
		setIdx := fmt.Sprintf("%d-%d", disk.PoolIndex, disk.SetIndex)
		indexed[setIdx] = append(indexed[setIdx], disk)
	}

	for id, disks := range indexed {
		ss := madmin.SetStatus{
			ID:        id,
			SetIndex:  disks[0].SetIndex,
			PoolIndex: disks[0].PoolIndex,
		}
		for _, disk := range disks {
			ss.Disks = append(ss.Disks, disk)
			if disk.Healing {

	for _, disk := range si.Disks {
		// Ignore invalid.
		if disk.PoolIndex < 0 || len(diskStats) <= disk.PoolIndex {
			// https://github.com/minio/minio/issues/16500
			continue
		}
		totalCap += disk.TotalSpace
		totalFree += disk.AvailableSpace

		diskStats[disk.PoolIndex].AvailableSpace += disk.AvailableSpace
		diskStats[disk.PoolIndex].TotalSpace += disk.TotalSpace
	}

	// of buckets is not known until the request is made. So we keep a separate
	// map for bucket metrics and handle them specially.

	// Add the serverName and poolIndex labels to all non-cluster metrics.
	//
	// Also create metric group maps and set the cache.
	metricsCache := newMetricsCache()
	mgMap := make(map[collectorPath]*MetricsGroup)

var OfflineDisk StorageAPI // zero value is nil

// erasureObjects - Implements ER object layer.
type erasureObjects struct {
	setDriveCount      int
	defaultParityCount int

	setIndex  int
	poolIndex int

	// getDisks returns list of storageAPIs.
	getDisks func() []StorageAPI

	// getLockers returns list of remote and local lockers.
	getLockers func() ([]dsync.NetLocker, string)

	// large disk setups.
	endpointStrings []string

	// Total number of sets and the number of disks per set.
	setCount, setDriveCount int
	defaultParityCount      int

	poolIndex int

	// Distribution algorithm of choice.
	distributionAlgo string
	deploymentID     [16]byte

	lastConnectDisksOpTime time.Time
}

var staleUploadsCleanupIntervalChangedCh = make(chan struct{})

	tracker.mu.RUnlock()
}

// Sort by zone, set and disk index
func sortDisks(disks []madmin.Disk) {
	sort.Slice(disks, func(i, j int) bool {
		a, b := &disks[i], &disks[j]
		if a.PoolIndex != b.PoolIndex {
			return a.PoolIndex < b.PoolIndex
		}
		if a.SetIndex != b.SetIndex {
			return a.SetIndex < b.SetIndex
		}
		return a.DiskIndex < b.DiskIndex
	})
}

		globalMRFState.addPartialOp(PartialOperation{
			Bucket:    bucket,
			Object:    object,
			Queued:    time.Now(),
			Versions:  versions,
			SetIndex:  er.setIndex,
			PoolIndex: er.poolIndex,
		})
	}

	if !opts.Speedtest && len(versions) == 0 {
		// Check if there is any offline disk and add it to the MRF list
		for _, disk := range onlineDisks {