return "", fmt.Errorf(`found backend type %s, expected %s or %s - to migrate to a supported backend visit https://min.io/docs/minio/linux/operations/install-deploy-manage/migrate-fs-gateway.html`, meta.Format, formatBackendErasure, formatBackendErasureSingle)
	}
	// Erasure backend found, proceed to detect version.
	format := &formatErasureVersionDetect{}
	if err := json.Unmarshal(b, format); err != nil {

	"Internal Server Error":           http.StatusInternalServerError,
	"Not Implemented":                 http.StatusNotImplemented,
	"Bad Gateway":                     http.StatusBadGateway,
	"Service Unavailable":             http.StatusServiceUnavailable,
	"Gateway Timeout":                 http.StatusGatewayTimeout,
	"HTTP Version Not Supported":      http.StatusHTTPVersionNotSupported,