for k, v := range b.cachesRoot {
		tmp := make([]string, len(v))
		copy(tmp, v)
		dst2[k] = tmp
	}

	return dst, dst2
}

// deleteAll will delete all on disk data for ALL caches.
// Deletes are performed concurrently.
func (b *bucketMetacache) deleteAll() {
	ctx := context.Background()

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

	ez, ok := objAPI.(deleteAllStorager)

func ExecObjectLayerTest(t TestErrHandler, objTest objTestType) {
	{
		ctx, cancel := context.WithCancel(context.Background())
		if localMetacacheMgr != nil {
			localMetacacheMgr.deleteAll()
		}

		objLayer, fsDir, err := prepareFS(ctx)
		if err != nil {
			t.Fatalf("Initialization of object layer failed for single node setup: %s", err)
		}
		setObjectLayer(objLayer)

		if disk != nil {
			wg.Add(1)
			go func(disk StorageAPI) {
				defer wg.Done()
				er.cleanupStaleUploadsOnDisk(ctx, disk)
			}(disk)
		}
	}
	wg.Wait()
}

func (er erasureObjects) deleteAll(ctx context.Context, bucket, prefix string) {
	var wg sync.WaitGroup
	for _, disk := range er.getDisks() {
		if disk == nil {
			continue
		}
		wg.Add(1)
		go func(disk StorageAPI) {
			defer wg.Done()

	}

	opts.Versioned = globalBucketVersioningSys.PrefixEnabled(obj.Bucket, obj.Name)
	opts.VersionSuspended = globalBucketVersioningSys.PrefixSuspended(obj.Bucket, obj.Name)

	if lcEvent.Action.DeleteAll() {
		opts.DeletePrefix = true
		// use prefix delete on exact object (this is an optimization to avoid fan-out calls)
		opts.DeletePrefixObject = true
	}
	var (
		dobj ObjectInfo
		err  error
	)

		}
	}

	if err == nil {
		// Purge the entire bucket metadata entirely.
		z.deleteAll(context.Background(), minioMetaBucket, pathJoin(bucketMetaPrefix, bucket))
	}

	return toObjectErr(err, bucket)
}

// deleteAll will rename bucket+prefix unconditionally across all disks to
// minioMetaTmpDeletedBucket + unique uuid,

			// If all disks are having errors, we give up.
			if disksToHealCount == 0 {
				return result, fmt.Errorf("all drives had write errors, unable to heal %s/%s", bucket, object)
			}
		}
	}

	defer er.deleteAll(context.Background(), minioMetaTmpBucket, tmpID)

	// Rename from tmp location to the actual location.
	for i, disk := range outDatedDisks {
		if disk == OfflineDisk {
			continue
		}

	}

	if len(buffer) > int(fi.Erasure.BlockSize) {
		buffer = buffer[:fi.Erasure.BlockSize]
	}

	partName := "part.1"
	tempErasureObj := pathJoin(uniqueID, fi.DataDir, partName)

	defer er.deleteAll(context.Background(), minioMetaTmpBucket, tempObj)

	var inlineBuffers []*bytes.Buffer
	if globalStorageClass.ShouldInline(erasure.ShardFileSize(data.ActualSize()), opts.Versioned) {

		g := errgroup.WithNErrs(len(localDrives))
		for index := range localDrives {
			g.Go(func() error {
				if localDrives[index] == nil {
					return errDiskNotFound
				}
				localDrives[index].DeleteVol(ctx, bucket, false)
				return nil
			}, index)
		}

		g.Wait()
	}

	// Create the lost volume only if its not marked for delete
	if !opts.Remove {
		// Initialize sync waitgroup.

			t.Fatalf("expected: %s, got: %s", errDiskAccessDenied, err)
		}
	}
}

// TestXLStorageDeleteVol - Validates the expected behavior of xlStorage.DeleteVol for various cases.
func TestXLStorageDeleteVol(t *testing.T) {
	// create xlStorage test setup
	xlStorage, path, err := newXLStorageTestSetup(t)
	if err != nil {

		t.Fatal(err)
	}

	// Remove the object backend files from the first disk.
	z := obj.(*erasureServerPools)
	er := z.serverPools[0].sets[0]
	firstDisk := er.getDisks()[0]
	err = firstDisk.DeleteVol(t.Context(), pathJoin(bucket, encodeDirObject(object)), true)
	if err != nil {
		t.Fatalf("Failed to delete a file - %v", err)
	}

	// Heal the object