One word:  backup. You should always have a backup - period - but especially when planning any type of upgrade, migration, move, etc. where the chance of unknown/known risks affecting the server's health increase. Some other things to consider: 
I'm getting ready to use a commercial mover to transport a Power Edge 700. What precautions should I take before putting it in a cardboard box, which will be put in a moving van, so the data and hard drive aren't trashed in transit? (I'm doing this to help a friend with limited technical skills; mine aren't a whole lot better.) Thanks so much! 
Preparing to move Power Edge 700 - precautions?