docs: private boolean isRunningOutOfDiskSpace() {
      // If there's not enough space left to allocate two log segments
      return raft.getStorage().statistics().getUsableSpace() < raft.getStorage().maxLogSegmentSize() * SEGMENT_BUFFER_FACTOR
          // Or the used disk percentage has surpassed the free disk buffer percentage
          || raft.getStorage().statistics().getUsableSpace() / (double) raft.getStorage().statistics().getTotalSpace() < raft.getStorage().freeDiskBuffer();
    }