uuidKV := mustGetUUID() + kvPrefix
	historyFile := pathJoin(minioConfigHistoryPrefix, uuidKV)

	if GlobalKMS != nil {
		var err error
		kv, err = config.EncryptBytes(GlobalKMS, kv, kms.Context{
			minioMetaBucket: path.Join(minioMetaBucket, historyFile),
		})
		if err != nil {
			return err
		}
	}
	return saveConfig(ctx, objAPI, historyFile, kv)
}

			continue
		}
		rc, err := localDrive.ReadFileStream(context.Background(), minioMetaBucket, pathJoin(healMRFDir, "list.bin"), 0, -1)
		if err != nil {
			continue
		}
		err = loadMRF(rc, m.opCh)
		if err != nil {
			continue
		}
		// finally delete the file after processing mrf entries
		localDrive.Delete(GlobalContext, minioMetaBucket, pathJoin(healMRFDir, "list.bin"), DeleteOptions{})
		break
	}
}

	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
		}

	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 {

		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
}

	// 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 {

			}
		}
		// 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.

	// 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`.

	if cleanup {
		// Recursively delete all caches.
		objAPI := newObjectLayerFn()
		if objAPI != nil {
			ez, ok := objAPI.(deleteAllStorager)
			if ok {
				ctx := context.Background()
				ez.deleteAll(ctx, minioMetaBucket, metacachePrefixForID(bucket, slashSeparator))
			}
		}
	}
	return &bucketMetacache{
		bucket:     bucket,
		caches:     make(map[string]metacache, 10),
		cachesRoot: make(map[string][]string, 10),
	}
}