buckets = append(buckets, BucketInfo{
		Name: pathJoin(minioMetaBucket, minioConfigPrefix),
	}, BucketInfo{
		Name: pathJoin(minioMetaBucket, bucketMetaPrefix),
	})

	// Heal latest buckets first.
	sort.Slice(buckets, func(i, j int) bool {
		a, b := strings.HasPrefix(buckets[i].Name, minioMetaBucket), strings.HasPrefix(buckets[j].Name, minioMetaBucket)
		if a != b {
			return a
		}

		return pdata, nil
	}
	if GlobalKMS != nil {
		pdata, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
			minioMetaBucket: path.Join(minioMetaBucket, objPath),
		})
		if err == nil {
			return pdata, nil
		}
		pdata, err = config.DecryptBytes(GlobalKMS, data, kms.Context{
			minioMetaBucket: objPath,
		})
		if err == nil {
			return pdata, nil
		}
	}
	return nil, err
}

	b, err := json.Marshal(m)
	if err != nil {
		t.Fatal(err)
	}

	if err = os.MkdirAll(pathJoin(rootPath, minioMetaBucket), os.FileMode(0o755)); err != nil {
		t.Fatal(err)
	}

	if err = os.WriteFile(pathJoin(rootPath, minioMetaBucket, formatConfigFile), b, os.FileMode(0o644)); err != nil {
		t.Fatal(err)
	}

	formatData, _, err := formatErasureMigrate(rootPath)
	if err != nil {

	// to `.minio.sys/tmp/` for deletion.
	return readDirFn(pathJoin(epPath, minioMetaBucket, bucketMetaPrefix), func(name string, typ os.FileMode) error {
		if typ == os.ModeDir {
			tmpMetacacheOld := pathutil.Join(epPath, minioMetaTmpDeletedBucket, mustGetUUID())
			if err := renameAll(pathJoin(epPath, minioMetaBucket, metacachePrefixForID(name, slashSeparator)),
				tmpMetacacheOld, epPath); err != nil && err != errFileNotFound {

	// Buckets data are dispersed in multiple zones/sets, make
	// sure to decommission the necessary metadata.
	decomMetaBuckets := []decomBucketInfo{
		{
			Name:   minioMetaBucket,
			Prefix: minioConfigPrefix,
		},
		{
			Name:   minioMetaBucket,
			Prefix: bucketMetaPrefix,
		},
	}

	return append(decomMetaBuckets, decomBuckets...), nil
}

	defer disk.Delete(context.TODO(), minioMetaBucket, tmpFormat, DeleteOptions{
		Recursive: false,
		Immediate: false,
	})

	// write to unique file.
	if err = disk.WriteAll(context.TODO(), minioMetaBucket, tmpFormat, formatData); err != nil {
		return err
	}

	// Rename file `uuid.json` --> `format.json`.

			}
		}
		// Load first part metadata...
		// Read metadata associated with the object from all disks.
		fi, metaArr, onlineDisks, err := er.getObjectFileInfo(ctx, minioMetaBucket, o.objectPath(0), ObjectOptions{}, true)
		if err != nil {
			switch toObjectErr(err, minioMetaBucket, o.objectPath(0)).(type) {
			case ObjectNotFound, InsufficientReadQuorum:
				retryWait()
				continue
			}
			// Allow one fast retry for other errors.

	"golang.org/x/exp/slices"
)

const (
	// MinIO meta bucket.
	minioMetaBucket = ".minio.sys"
	// Multipart meta prefix.
	mpartMetaPrefix = "multipart"
	// MinIO Multipart meta prefix.
	minioMetaMultipartBucket = minioMetaBucket + SlashSeparator + mpartMetaPrefix
	// MinIO tmp meta prefix.
	minioMetaTmpBucket = minioMetaBucket + "/tmp"
	// MinIO tmp meta prefix for deleted objects.

	data, err := json.Marshal(item)
	if err != nil {
		return err
	}
	if GlobalKMS != nil {
		data, err = config.EncryptBytes(GlobalKMS, data, kms.Context{
			minioMetaBucket: path.Join(minioMetaBucket, itemPath),
		})
		if err != nil {
			return err
		}
	}
	return saveKeyEtcd(ctx, ies.client, itemPath, data, opts...)
}

	// Encrypt json encoded tier configurations
	metadata := make(map[string]string)
	encBr, oek, err := newEncryptReader(context.Background(), hr, crypto.S3, "", nil, minioMetaBucket, tierConfigPath, metadata, kms.Context{})
	if err != nil {
		return nil, nil, err
	}

	info := ObjectInfo{
		Size: payloadSize,
	}
	encSize := info.EncryptedSize()