if dataDir == "" {
		return nil
	}
	g := errgroup.WithNErrs(len(onlineDisks))
	for index := range onlineDisks {
		index := index
		g.Go(func() error {
			if onlineDisks[index] == nil {
				return nil
			}
			return onlineDisks[index].Delete(ctx, bucket, pathJoin(object, dataDir), DeleteOptions{

				if partsMetadata[index].IsValid() && e == etag {
					onlineDisks[index] = disks[index]
				} else {
					onlineDisks[index] = nil
				}
			}
			return onlineDisks, modTime, etag
		}
	}

	// Create a new online disks slice, which have common uuid.
	for index, t := range modTimes {
		if partsMetadata[index].IsValid() && t.Equal(modTime) {
			onlineDisks[index] = disks[index]
		} else {

		// Check if there is any offline disk and add it to the MRF list
		for _, disk := range onlineDisks {
			if disk != nil && disk.IsOnline() {
				continue
			}
			er.addPartial(bucket, object, fi.VersionID)
			break
		}
	}

	for i := 0; i < len(onlineDisks); i++ {
		if onlineDisks[i] != nil && onlineDisks[i].IsOnline() {
			// Object info is the same in all disks, so we can pick

}

func getOnlineOfflineDisksStats(disksInfo []madmin.Disk) (onlineDisks, offlineDisks madmin.BackendDisks) {
	onlineDisks = make(madmin.BackendDisks)
	offlineDisks = make(madmin.BackendDisks)

	for _, disk := range disksInfo {
		ep := disk.Endpoint
		if _, ok := offlineDisks[ep]; !ok {
			offlineDisks[ep] = 0
		}
		if _, ok := onlineDisks[ep]; !ok {
			onlineDisks[ep] = 0
		}
	}

	// Wait for the routines.

			rQuorum := len(errs) - z.serverPools[0].sets[0].defaultParityCount
			onlineDisks, modTime, _ := listOnlineDisks(erasureDisks, partsMetadata, test.errs, rQuorum)
			if !modTime.Equal(test.expectedTime) {
				t.Fatalf("Expected modTime to be equal to %v but was found to be %v",
					test.expectedTime, modTime)
			}
			availableDisks, newErrs, _ := disksWithAllParts(ctx, onlineDisks, partsMetadata,
				test.errs, fi, bucket, object, madmin.HealDeepScan)

	var msg string
	var mcMessage string
	onlineDisks, offlineDisks := getOnlineOfflineDisksStats(storageInfo.Disks)
	if storageInfo.Backend.Type == madmin.Erasure {
		if offlineDisks.Sum() > 0 {
			mcMessage = "Use `mc admin info` to look for latest server/drive info\n"
		}

		diskInfo := fmt.Sprintf(" %d Online, %d Offline. ", onlineDisks.Sum(), offlineDisks.Sum())

	if objLayer == nil {
		return
	}

	server := getLocalServerProperty(globalEndpoints, &http.Request{
		Host: globalLocalNodeName,
	}, true)

	onlineDisks, offlineDisks := getOnlineOfflineDisksStats(server.Disks)
	totalDisks := offlineDisks.Merge(onlineDisks)

	// Report total capacity
	ch <- prometheus.MustNewConstMetric(
		prometheus.NewDesc(
			prometheus.BuildFQName(minioNamespace, "capacity_raw", "total"),

				time.Sleep(retryDelay)
			} else {
				time.Sleep(retryDelay250)
			}
		}
		// Load first part metadata...
		// Read metadata associated with the object from all disks.
		fi, metaArr, onlineDisks, err := er.getObjectFileInfo(ctx, minioMetaBucket, o.objectPath(0), ObjectOptions{}, true)
		if err != nil {
			switch toObjectErr(err, minioMetaBucket, o.objectPath(0)).(type) {
			case ObjectNotFound, InsufficientReadQuorum:

	}

	result.ParityBlocks = result.DiskCount - readQuorum
	result.DataBlocks = readQuorum

	// List of disks having latest version of the object xl.meta
	// (by modtime).
	onlineDisks, modTime, etag := listOnlineDisks(storageDisks, partsMetadata, errs, readQuorum)

	// Latest FileInfo for reference. If a valid metadata is not
	// present, it is as good as object not found.

		var allDisks []madmin.Disk
		for _, s := range servers {
			allDisks = append(allDisks, s.Disks...)
		}
		onlineDisks, offlineDisks := getOnlineOfflineDisksStats(allDisks)

		backend = madmin.ErasureBackend{
			Type:             madmin.ErasureType,
			OnlineDisks:      onlineDisks.Sum(),
			OfflineDisks:     offlineDisks.Sum(),
			StandardSCParity: backendInfo.StandardSCParity,