if err != nil {
			storageLogIf(ctx, err)
		}
		// let's the rest shutdown
	}
	return nil
}

// Legacy returns 'true' if distribution algo is CRCMOD
func (z *erasureServerPools) Legacy() (ok bool) {
	ok = true
	for _, set := range z.serverPools {
		ok = ok && set.Legacy()
	}
	return ok
}

func (z *erasureServerPools) BackendInfo() (b madmin.BackendInfo) {
	b.Type = madmin.Erasure

	if err != nil {
		return nil, err
	}
	defer done(&err)

	return p.storage.ListDir(ctx, origvolume, volume, dirPath, count)
}

// Legacy API - does not have any deadlines
func (p *xlStorageDiskIDCheck) ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error) {

		srcInfo.UserDefined[k] = v
	}

	// Ensure that metadata does not contain sensitive information
	crypto.RemoveSensitiveEntries(srcInfo.UserDefined)

	// If we see legacy source, metadataOnly we have to overwrite the content.
	if srcInfo.Legacy {
		srcInfo.metadataOnly = false
	}

	// Check if x-amz-metadata-directive or x-amz-tagging-directive was not set to REPLACE and source,

	return s.WriteAll(ctx, volume, pathJoin(path, xlStorageFormatFile), buf)
}

func (s *xlStorage) renameLegacyMetadata(volumeDir, path string) (err error) {
	s.RLock()
	legacy := s.formatLegacy
	s.RUnlock()
	if !legacy {
		// if its not a legacy backend then this function is
		// a no-op always returns errFileNotFound
		return errFileNotFound
	}

	// Validate file path length, before reading.

		}
	case config.PolicyOPASubSys:
		// In case legacy OPA config is being set, we treat it as if the
		// AuthZPlugin is being set.
		subSys = config.PolicyPluginSubSys
		fallthrough
	case config.PolicyPluginSubSys:
		if ppargs, err := polplugin.LookupConfig(s, GetDefaultConnSettings(), xhttp.DrainBody); err != nil {
			return err
		} else if ppargs.URL == nil {
			// Check if legacy opa is configured.

	if err != nil {
		return nil, -1, err
	}

	for i, endpointList := range poolEndpoints {
		if err = endpointServerPools.Add(PoolEndpoints{
			Legacy:       legacy,
			SetCount:     len(poolArgs[i].layout),
			DrivesPerSet: len(poolArgs[i].layout[0]),
			Endpoints:    endpointList,
			Platform:     fmt.Sprintf("OS: %s | Arch: %s", runtime.GOOS, runtime.GOARCH),
			CmdLine:      poolArgs[i].cmdline,

	// formatErasureV2.Erasure.Version - version '2'.
	formatErasureVersionV2 = "2"

	// formatErasureV3.Erasure.Version - version '3'.
	formatErasureVersionV3 = "3"

	// Distribution algorithm used, legacy
	formatErasureVersionV2DistributionAlgoV1 = "CRCMOD"

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

	// Distributed algorithm used, with EC:4 default parity

		DataBlocks:       fi.Erasure.DataBlocks,
		VersionID:        versionID,
		IsLatest:         fi.IsLatest,
		DeleteMarker:     fi.Deleted,
		Size:             fi.Size,
		ModTime:          fi.ModTime,
		Legacy:           fi.XLV1,
		ContentType:      fi.Metadata["content-type"],
		ContentEncoding:  fi.Metadata["content-encoding"],
		NumVersions:      fi.NumVersions,
		SuccessorModTime: fi.SuccessorModTime,

	queryValue := url.Values{}
	queryValue.Set("lifecycle", "")
	return makeTestTargetURL(endPoint, bucketName, "", queryValue)
}

// return URL for listing objects in the bucket with V1 legacy API.
func getListObjectsV1URL(endPoint, bucketName, prefix, maxKeys, encodingType string) string {
	queryValue := url.Values{}
	if maxKeys != "" {
		queryValue.Set("max-keys", maxKeys)
	}

	// Storage operations.
	Shutdown(context.Context) error
	NSScanner(ctx context.Context, updates chan<- DataUsageInfo, wantCycle uint32, scanMode madmin.HealScanMode) error
	BackendInfo() madmin.BackendInfo
	Legacy() bool // Only returns true for deployments which use CRCMOD as its object distribution algorithm.
	StorageInfo(ctx context.Context, metrics bool) StorageInfo
	LocalStorageInfo(ctx context.Context, metrics bool) StorageInfo