RHEL 4 Update problem

[Scott Becker]

I just installed 4 ES on a server last Wednesday. I had to select 
I2O_BLOCK driver to get it see my Adaptec raid array (on zero channel 
controller). Two days later (friday) I installed the latest updates with 
'up2date -u -f' and an updated kernel installed along with other 
packages. The machine now hangs on boot with a blank screen except for 
'GRUB _'.  I presume that after the kernel update, grub does not have 
what it needs to have in order to access the I2O device, even though it 
did after install. I think I can boot from install #1 and access the drive.

Does anybody know the specifics of what it takes for GRUB to access I2O?

    scottb