// Init and run test on ErasureSD backend with signature v4.
		{serverType: "ErasureSD", signer: signerV4},
		// Init and run test on ErasureSD backend with signature v2.
		{serverType: "ErasureSD", signer: signerV2},
		// Init and run test on ErasureSD backend, with tls enabled.
		{serverType: "ErasureSD", signer: signerV4, secure: true},
		// Init and run test on Erasure backend.
		{serverType: "Erasure", signer: signerV4},

		}

		// Fetching the backend information
		backendInfo := objectAPI.BackendInfo()
		// Calculate the number of online/offline disks of all nodes
		var allDisks []madmin.Disk
		for _, s := range servers {
			allDisks = append(allDisks, s.Disks...)
		}
		onlineDisks, offlineDisks := getOnlineOfflineDisksStats(allDisks)

		backend = madmin.ErasureBackend{

		// Init and run test on ErasureSD backend with signature v4.
		{serverType: "ErasureSD", signer: signerV4},
		// Init and run test on ErasureSD backend, with tls enabled.
		{serverType: "ErasureSD", signer: signerV4, secure: true},
		// Init and run test on Erasure backend.
		{serverType: "Erasure", signer: signerV4},
		// Init and run test on ErasureSet backend.
		{serverType: "ErasureSet", signer: signerV4},
	}

		})

		metrics = append(metrics, MetricV2{
			Description: getNodeStandardParityMD(),
			Value:       float64(storageInfo.Backend.StandardSCParity),
		})

		metrics = append(metrics, MetricV2{
			Description: getNodeRRSParityMD(),
			Value:       float64(storageInfo.Backend.RRSCParity),
		})

		return metrics
	})
	return mg
}

func getClusterWriteQuorumMD() MetricDescription {

	resyncTimer := time.NewTimer(resyncTimeInterval)
	defer resyncTimer.Stop()

	// For each bucket name, store the last timestamp of the
	// successful save of replication status in the backend disks.
	lastResyncStatusSave := make(map[string]time.Time)

	for {
		select {
		case <-resyncTimer.C:
			s.RLock()
			for bucket, brs := range s.statusMap {
				var updt bool