var disks []string
	var err error
	var opts ObjectOptions

	objLayer, disks, err = prepareErasure16(ctx)
	if err != nil {
		t.Fatal(err)
	}

	// cleaning up of temporary test directories
	defer objLayer.Shutdown(context.Background())
	defer removeRoots(disks)

	err = objLayer.MakeBucket(ctx, "bucket1", MakeBucketOptions{})
	if err != nil {
		t.Fatal(err)
	}

	defer cancel()

	obj, disks, err := prepareErasure16(ctx)
	if err != nil {
		t.Fatalf("Prepare Erasure backend failed - %v", err)
	}
	setObjectLayer(obj)
	defer obj.Shutdown(context.Background())
	defer removeRoots(disks)

	type tamperKind int
	const (
		noTamper tamperKind = iota
		deletePart
		corruptPart
	)

	timeSentinel := time.Unix(1, 0).UTC()

	ctxt.ConnClientWriteDeadline = ctx.Duration("conn-client-write-deadline")
	ctxt.SendBufSize = ctx.Int("send-buf-size")
	ctxt.RecvBufSize = ctx.Int("recv-buf-size")

	ctxt.ShutdownTimeout = ctx.Duration("shutdown-timeout")
	ctxt.IdleTimeout = ctx.Duration("idle-timeout")
	ctxt.ReadHeaderTimeout = ctx.Duration("read-header-timeout")
	ctxt.MaxIdleConnsPerHost = ctx.Int("max-idle-conns-per-host")

func (er erasureObjects) NewNSLock(bucket string, objects ...string) RWLocker {
	return er.nsMutex.NewNSLock(er.getLockers, bucket, objects...)
}

// Shutdown function for object storage interface.
func (er erasureObjects) Shutdown(ctx context.Context) error {
	// Add any object layer shutdown activities here.
	closeStorageDisks(er.getDisks()...)
	return nil
}

// defaultWQuorum write quorum based on setDriveCount and defaultParityCount

		EnvVar: "MINIO_CONSOLE_ADDRESS",
	},
	cli.DurationFlag{
		Name:   "shutdown-timeout",
		Value:  xhttp.DefaultShutdownTimeout,
		Usage:  "shutdown timeout to gracefully shutdown server",
		EnvVar: "MINIO_SHUTDOWN_TIMEOUT",
		Hidden: true,
	},
	cli.DurationFlag{
		Name:   "idle-timeout",
		Value:  xhttp.DefaultIdleTimeout,

}

// ObjectLayer implements primitives for object API layer.
type ObjectLayer interface {
	// Locking operations on object.
	NewNSLock(bucket string, objects ...string) RWLocker

	// Storage operations.
	Shutdown(context.Context) error
	NSScanner(ctx context.Context, updates chan<- DataUsageInfo, wantCycle uint32, scanMode madmin.HealScanMode) error
	BackendInfo() madmin.BackendInfo

	}

	return storageInfo
}

// Shutdown shutsdown all erasure coded sets in parallel
// returns error upon first error.
func (s *erasureSets) Shutdown(ctx context.Context) error {
	g := errgroup.WithNErrs(len(s.sets))

	for index := range s.sets {
		index := index
		g.Go(func() error {
			return s.sets[index].Shutdown(ctx)
		}, index)
	}

	for _, err := range g.Wait() {

func TestHealing(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	obj, fsDirs, err := prepareErasure16(ctx)
	if err != nil {
		t.Fatal(err)
	}
	defer obj.Shutdown(context.Background())

	// initialize the server and obtain the credentials and root.
	// credentials are necessary to sign the HTTP request.
	if err = newTestConfig(globalMinioDefaultRegion, obj); err != nil {