[CentOS] SERVER DOWN, boots to "GRUB"

All that's seen on the screen is the four letters ''GRUB". I'm assuming that 
grub needs to be reloaded into HDD master boot record. (?!)  What's the 
easiest way to do this? 

System is a Dual Opteron/64, DUAL SCSI 10K drives, configured with software 
RAID1. 

-Ben 
-- 
"The best way to predict the future is to invent it."
- XEROX PARC slogan, circa 1978

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.