func (b *bucketMetacache) deleteAll() {
	ctx := context.Background()

	objAPI := newObjectLayerFn()
	if objAPI == nil {
		return
	}

	ez, ok := objAPI.(deleteAllStorager)
	if !ok {
		bugLogIf(ctx, errors.New("bucketMetacache: expected objAPI to be 'deleteAllStorager'"))
		return
	}

	b.mu.Lock()
	defer b.mu.Unlock()

	b.updated = true
	// Delete all.