public static final void updateReadLatency(long latencyMillis, boolean pread, boolean tooSlow) {
    RpcServer.getCurrentCall().ifPresent(call -> call.updateFsReadTime(latencyMillis));
    if (pread) {
      MetricsIO.getInstance().updateFsPreadTime(latencyMillis);
    } else {
      MetricsIO.getInstance().updateFsReadTime(latencyMillis);
    }
    if (tooSlow) {
      MetricsIO.getInstance().incrSlowFsRead();
    }
  }
Number of checksum verification failures. It also clears the counter.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java