newbie question - error with replication

[Raymond Jennings III]

I am trying to resolve an IOException error.  I have a basic setup and shortly 
after running start-dfs.sh I get a:

error: java.io.IOException: File /tmp/hadoop-root/mapred/system/jobtracker.info 
could only be replicated to 0 nodes, instead of 1
java.io.IOException: File /tmp/hadoop-root/mapred/system/jobtracker.info could 
only be replicated to 0 nodes, instead of 1

Any pointers how to resolve this?  Thanks!