A year ago, this site was down.  Kaput.  Dead.  It had 404ed and gone to see the coder in the sky.  What happened?  We switched to a new host, and they gave us a system with a faulty hard drive.  It wiped out the entire site.  Cue three weeks of tearing my hair out as we tried to put the site back together on a new host from bits and pieces from different dates we had backed up.  Thankfully, after a lot of work, we got the site back up and running with very few issues.  Even today we still find things that vanished because of that time, but in the end the damage was minimum not counting the time we were offline.  Let us never have to go through something like that again.