title: How to fix corrupt HDFS FIles
body: <p>How does someone fix a HDFS that's corrupt?  I looked on the Apache/Hadoop website and it said its <a href="http://hadoop.apache.org/docs/r0.19.0/hdfs_user_guide.html#fsck" rel="noreferrer"><code>fsck</code> command</a>, which doesn't fix it. Hopefully someone who has run into this problem before can tell me how to fix this.</p>
  
  <blockquote>
    <p>Unlike a traditional fsck utility for native file systems, this command does not correct the errors it detects. Normally NameNode automatically corrects most of the recoverable failures.</p>
  </blockquote>
  
  <p>When I ran <code>bin/hadoop fsck / -delete</code>, it listed the files that were corrupt or missing blocks.  How do I make it not corrupt?  This is on a practice machine so I COULD blow everything away but when we go live, I won't be able to "fix" it by blowing everything away so I'm trying to figure it out now.</p>