Invoke the install operation from interactive SQL or from the web user 
  interface.  This will:If there was a failure in mid-install, such as running out of disk or 
  some other serious unrecoverable database error, the server exits.  The 
  installation can be undone manually by halting the server, deleting the 
  transaction log file and restarting. The server will start from the checkpoint 
  as if the installation was never attempted.