title: Is it normal for MongoDB whole /data/db to be gone after a electric trip that result in crash
body: <p>I have a single machine that has MongoDB and its data is at /data/db as usual.</p>
  
  <p>When my machine crashed due to an electric power trip, my MongoDB refuse to start at launch (Mac OS X Server via LaunchAgent) and also /data/db mysteriously disappear!</p>
  
  <p>Also all log file are wipe out. This happen on my development SSD MBA and I thought is just a weird SSD case. But my XServe server is getting it as well when the power trip.</p>
  
  <p>Am I missing some data protection articles somewhere? For sure it can't be this unreliable by just deleting /data/db!!??</p>