| `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`               |

// label constants
const (
	driveL      = "drive"
	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 (

		TotalSpace     uint64
	}, len(z.serverPools))
	for _, disk := range si.Disks {
		// Ignore invalid.
		if disk.PoolIndex < 0 || len(diskStats) <= disk.PoolIndex {
			// https://github.com/minio/minio/issues/16500
			continue
		}
		diskStats[disk.PoolIndex].AvailableSpace += disk.AvailableSpace
		diskStats[disk.PoolIndex].TotalSpace += disk.TotalSpace
	}

	stopTime := meta.StoppedAt
	r = rebalanceAdminStatus{
		ID:        meta.ID,

// 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)
}

	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
	}

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
	})
}

// but not written in all disks (having quorum)
type PartialOperation struct {
	Bucket              string
	Object              string
	VersionID           string
	Versions            []byte
	SetIndex, PoolIndex int
	Queued              time.Time
	BitrotScan          bool
}

// mrfState sncapsulates all the information
// related to the global background MRF.
type mrfState struct {
	opCh chan PartialOperation