// healing tracker is always for local disks.
	return nil
}

func (client *storageRESTClient) NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode, _ func() bool) (dataUsageCache, error) {
	defer xioutil.SafeClose(updates)

	st, err := storageNSScannerRPC.Call(ctx, client.gridConn, &nsScannerOptions{
		DiskID:   *client.diskID.Load(),
		ScanMode: int(scanMode),

	Exists  bool      // Returns whether the file existed on disk.
	Error   string    // Returns any error when reading.
	Data    []byte    // Contains all data of file.
	Modtime time.Time // Modtime of file on disk.
}

// DeleteVersionHandlerParams are parameters for DeleteVersionHandler
type DeleteVersionHandlerParams struct {
	DiskID         string        `msg:"id"`
	Volume         string        `msg:"v"`

	}
}

func initHealingTracker(disk StorageAPI, healID string) *healingTracker {
	h := newHealingTracker()
	diskID, _ := disk.GetDiskID()
	h.disk = disk
	h.ID = diskID
	h.HealID = healID
	h.Path = disk.String()
	h.Endpoint = disk.Endpoint().String()
	h.Started = time.Now().UTC()
	h.PoolIndex, h.SetIndex, h.DiskIndex = disk.GetDiskLoc()
	return h
}

func (client *storageRESTClient) WalkDir(ctx context.Context, opts WalkDirOptions, wr io.Writer) error {
	// Ensure remote has the same disk ID.
	opts.DiskID = *client.diskID.Load()
	b, err := opts.MarshalMsg(grid.GetByteBuffer()[:0])
	if err != nil {
		return toStorageErr(err)
	}

	st, err := client.gridConn.NewStream(ctx, grid.HandlerWalkDir, b)
	if err != nil {

// IsValid - To authenticate and check if the disk-id in the request corresponds to the underlying disk.
func (s *storageRESTServer) IsValid(w http.ResponseWriter, r *http.Request) bool {
	if !s.IsAuthValid(w, r) {
		return false
	}

	if err := r.ParseForm(); err != nil {
		s.writeErrorResponse(w, err)
		return false
	}

	diskID := r.Form.Get(storageRESTDiskID)
	if diskID == "" {

// format, after successful validation.
//   - i'th position is the set index
//   - j'th position is the disk index in the current set
func findDiskIndexByDiskID(refFormat *formatErasureV3, diskID string) (int, int, error) {
	if diskID == "" {
		return -1, -1, errDiskNotFound
	}
	if diskID == offlineDiskUUID {
		return -1, -1, fmt.Errorf("DriveID: %s is offline", diskID)
	}

	return p.storage.GetDiskID()
}

func (p *xlStorageDiskIDCheck) SetDiskID(id string) {
	p.diskID.Store(&id)
}

func (p *xlStorageDiskIDCheck) checkDiskStale() error {
	if *p.diskID.Load() == emptyDiskID {
		// For empty disk-id we allow the call as the server might be
		// coming up and trying to read format.json or create format.json
		return nil
	}

			name := f.Name()
			if name == fcPath {
				disk, err := io.EvalSymlinks(devID + name)
				if err != nil {
					klog.V(2).Infof("fc: failed to find a corresponding disk from symlink[%s], error %v", devID+name, err)
					return "", ""
				}
				dm := deviceUtil.FindMultipathDeviceForDevice(disk)
				klog.Infof("fc: find disk: %v, dm: %v", disk, dm)
				return disk, dm
			}
		}
	}

        {{- end }}
  {{- if .Values.persistence.enabled }}
  volumeClaimTemplates:
    {{- if gt $drivesPerNode 1 }}
    {{- range $diskId := until $drivesPerNode}}
    - apiVersion: v1
      kind: PersistentVolumeClaim
      metadata:
        name: export-{{ $diskId }}
        {{- if $.Values.persistence.annotations }}
        annotations: {{- toYaml $.Values.persistence.annotations | nindent 10 }}
        {{- end }}

	for i, format := range formats {
		if format == nil {
			continue
		}
		h := sha256.New()
		for _, set := range format.Erasure.Sets {
			for _, diskID := range set {
				h.Write([]byte(diskID))
			}
		}
		formatHashes[i] = hex.EncodeToString(h.Sum(nil))
	}

	formatCountMap := make(map[string]int)
	for _, hash := range formatHashes {
		if hash == "" {
			continue