Hi guys and gals ... hope someone can help me out as I'm running desperate!

I have a brand new machine with 4 x 80gb SATA (Seagate) hdd's, a Tyan S2865 mobo, AMD64 3000+ cpu and a 3ware 9500 RAID card.

I want to set up two RAID 1 arrays - one bootable with centos 4 (rhel 4 dist) and the other as data (mysql tables).

So I alt-3 to enter the RAID card set up, it finds the four sata hdd's. I create two RAID 1 arrays with these no problem. I then reboot and boot from CD to install centos 4.0 with the partitions created automatically as follows:

CODE
code:DEVICE          START    END   SIZE      TYPE         MOUNT POINT

VG VolGroup00                  152352M   VolGroup  
LV LogVol00                    150272M   ext3         /
LV LogVol01                      1984M   swap
/dev/sda
  sda1              1     13     101M   ext3         /boot
  sda2             14   9724   76277M   physical v
/dev/sdb
  sdb1              1   9724   76277M   physical v


At the end of the installation I get prompted to reboot. Everything shuts down and comes back up. BIOS etc scrolls through but the system hangs on the grub boot loader (a flashing underscore _).

question is have I set the RAID up correctly or is this a grub problem that needs ammending?

My grub.conf file shows:
CODE
code:default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS 4.0(2.6.9-5.0.3.EL)
     root (hd0,0)
     kernel /vmlinuz-2.6.9-5.0.3.EL ro root=/dev/VolGroup00/LogVol00
     initrd /initrd-2.6.9-5.0.3.EL.img



device.map shows:
CODE
code:(fd0)      /dev/fd0
(hd0)      /dev/sda


Thanks in advance ...