m.Set(driveTotalInodes, float64(drive.UsedInodes+drive.FreeInodes), labels...)

	var healing, online float64
	if drive.Healing {
		healing = 1
	}
	m.Set(driveHealing, healing, labels...)

	if drive.State == "ok" {
		online = 1
	}
	m.Set(driveOnline, online, labels...)
}

func (m *MetricValues) setDriveAPIMetrics(disk madmin.Disk, labels []string) {
	if disk.Metrics == nil {

	"github.com/minio/madmin-go/v3"
)

// StorageAPI interface.
type StorageAPI interface {
	// Stringified version of disk.
	String() string

	// Storage operations.

	// Returns true if disk is online and its valid i.e valid format.json.
	// This has nothing to do with if the drive is hung or not responding.
	// For that individual storage API calls will fail properly. The purpose

	}
	idx := xxhash.Sum64String(s) % uint64(len(peerClients))
	return peerClients[idx]
}

// GetPeerOnlineCount gets the count of online and offline nodes.
func (sys *NotificationSys) GetPeerOnlineCount() (nodesOnline, nodesOffline int) {
	nodesOnline = 1 // Self is always online.
	nodesOffline = 0
	nodesOnlineIndex := make([]bool, len(sys.peerClients))
	var wg sync.WaitGroup
	for idx, client := range sys.peerClients {

	if err != nil {
		return fi, nil, err
	}

	quorum := readQuorum
	if write {
		quorum = writeQuorum
	}

	// List all online disks.
	_, modTime, etag := listOnlineDisks(storageDisks, partsMetadata, errs, quorum)

	var reducedErr error
	if write {
		reducedErr = reduceWriteQuorumErrs(ctx, errs, objectOpIgnoredErrs, writeQuorum)
	} else {

		kmsCtx, err := kmsContext.MarshalText()
		if err != nil {
			results = append(results, VerifyResult{Status: "offline", Endpoint: endpoint})
			continue
		}
		result := VerifyResult{Status: "online", Endpoint: endpoint, Version: state.Version}
		key, err := client.GenerateKey(ctx, env.Get(EnvKESKeyName, ""), kmsCtx)
		if err != nil {
			result.Encrypt = fmt.Sprintf("Encryption failed: %v", err)
		} else {

			localEndpoints = append(localEndpoints, endpoint)
		}
	}

	return getStorageInfo(localDisks, localEndpoints, metrics)
}

// getOnlineDisksWithHealingAndInfo - returns online disks and overall healing status.
// Disks are ordered in the following groups:
// - Non-scanning disks
// - Non-healing disks
// - Healing disks (if inclHealing is true)

				if aerr == nil {
					return
				}
				batchLogIf(ctx,
					fmt.Errorf("trying %s: Unable to cleanup failed multipart replication %s on remote %s/%s: %w - this may consume space on remote cluster",
						humanize.Ordinal(attempts), res.UploadID, tgtBucket, tgtObject, aerr))
				attempts++
				time.Sleep(time.Second)
			}
		}
	}()

	var (
		hr    *hash.Reader
		pInfo PartInfo
	)

		Endpoints:    make(map[string]madmin.ItemState, len(stat.Endpoints)),
	}
	for _, endpoint := range stat.Endpoints {
		status.Endpoints[endpoint] = madmin.ItemOnline // TODO(aead): Implement an online check for mTLS
	}

	resp, err := json.Marshal(status)
	if err != nil {
		writeCustomErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInternalError), err.Error(), r.URL)
		return
	}

	// Return error when quorum unformatted disks - indicating we are
	// waiting for first server to be online.
	unformattedDisks := quorumUnformattedDisks(sErrs)
	if unformattedDisks && !firstDisk {
		return nil, nil, errNotFirstDisk
	}

	// Return error when quorum unformatted disks but waiting for rest
	// of the servers to be online.
	if unformattedDisks && firstDisk {
		return nil, nil, errFirstDiskWait
	}

		clusterDriveMetrics: newClusterStorageInfoCache(),
		nodesUpDown:         newNodesUpDownCache(),
	}
}

type nodesOnline struct {
	Online, Offline int
}

func newNodesUpDownCache() *cachevalue.Cache[nodesOnline] {
	loadNodesUpDown := func() (v nodesOnline, err error) {
		v.Online, v.Offline = globalNotificationSys.GetPeerOnlineCount()
		return
	}
	return cachevalue.NewFromFunc(1*time.Minute,