defer xioutil.ODirectPoolLarge.Put(bufp)
	}

	var written int64
	if odirectEnabled {
		written, err = xioutil.CopyAligned(diskHealthWriter(ctx, w), r, *bufp, fileSize, w)
	} else {
		written, err = io.CopyBuffer(diskHealthWriter(ctx, w), r, *bufp)
	}
	if err != nil {
		w.Close()
		return err
	}

	if written < fileSize && fileSize >= 0 {
		w.Close()
		return errLessData