formatErasureVersionV2DistributionAlgoV1 = "CRCMOD"

	// Distributed algorithm used, with N/2 default parity
	formatErasureVersionV3DistributionAlgoV2 = "SIPMOD"

	// Distributed algorithm used, with EC:4 default parity
	formatErasureVersionV3DistributionAlgoV3 = "SIPMOD+PARITY"
)

// Offline disk UUID represents an offline disk.
const offlineDiskUUID = "ffffffff-ffff-ffff-ffff-ffffffffffff"

				mapped = make([]byte, size)
				filled = make([]byte, size)
			}
			data = ei.V2Obj.EcM
			parity = ei.V2Obj.EcN
			if shards == 0 {
				shards = data + parity
			}
			idx = ei.V2Obj.EcIndex - 1
			fmt.Println("Read shard", ei.V2Obj.EcIndex, "Data shards", data, "Parity", parity, fmt.Sprintf("(%s)", file))
			if ei.V2Obj.Size != size {
				return fmt.Errorf("size mismatch. Meta size: %d", ei.V2Obj.Size)

		if m.IsValid() {
			tags["size"] = m.Size
			tags["mtime"] = m.ModTime.Format(http.TimeFormat)
			tags["data"] = m.Erasure.DataBlocks
			tags["parity"] = m.Erasure.ParityBlocks
		} else {
			tags["invalid-meta"] = true
			tags["data"] = er.setDriveCount - er.defaultParityCount
			tags["parity"] = er.defaultParityCount
		}

		// count the number of offline disks
		offline := 0

		// If storage class is not set during startup, default values are used
		// -- Default for Reduced Redundancy Storage class is, parity = 2
		// -- Default for Standard Storage class is, parity = 2 - disks 4, 5
		// -- Default for Standard Storage class is, parity = 3 - disks 6, 7
		// -- Default for Standard Storage class is, parity = 4 - disks 8 to 16
		if commonParityDrives == 0 {
			commonParityDrives, err = ecDrivesNoConfig(ep.DrivesPerSet)

		Subsystem: storageClassSubsystem,
		Name:      "standard_parity",
		Help:      "standard storage class parity",
		Type:      gaugeMetric,
	}
}

func getNodeRRSParityMD() MetricDescription {
	return MetricDescription{
		Namespace: nodeMetricNamespace,
		Subsystem: storageClassSubsystem,
		Name:      "rrs_parity",
		Help:      "reduced redundancy storage class parity",
		Type:      gaugeMetric,
	}
}

	// Use the maximum parity (N/2), used when saving server configuration files
	MaxParity bool

	// Provides a per object encryption function, allowing metadata encryption.
	EncryptFn objectMetaEncryptFn

	// SkipDecommissioned set to 'true' if the call requires skipping the pool being decommissioned.
	// mainly set for certain WRITE operations.
	SkipDecommissioned bool

			nfi.Data = nil
			nfi.Erasure.Index = 0
			nfi.Erasure.Checksums = nil
		}
		return nfi
	}

	// We write at temporary location and then rename to final location.
	tmpID := mustGetUUID()
	migrateDataDir := mustGetUUID()

	// Reorder so that we have data disks first and parity disks next.
	if !latestMeta.Deleted && len(latestMeta.Erasure.Distribution) != len(availableDisks) {

	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 {

		Hidden: true,
		EnvVar: "MINIO_CONN_CLIENT_READ_DEADLINE",
	},
	cli.DurationFlag{
		Name:   "conn-client-write-deadline",
		Usage:  "custom connection WRITE deadline for outgoing requests",
		Hidden: true,
		EnvVar: "MINIO_CONN_CLIENT_WRITE_DEADLINE",
	},
	cli.DurationFlag{
		Name:   "conn-read-deadline",
		Usage:  "custom connection READ deadline",
		Hidden: true,

			}
			if err := saveFormatErasure(storageDisks[index], format, formatOpID); err != nil {
				healingLogIf(ctx, fmt.Errorf("Drive %s failed to write updated 'format.json': %v", storageDisks[index], err))
				storageDisks[index].Close()
				tmpNewFormats[index] = nil // this disk failed to write new format
			}
		}

		s.erasureDisksMu.Lock()

		for index, format := range tmpNewFormats {
			if format == nil {