[CentOS] CentOS 5 grub boot problem

I am trying to upgrade my system from 500GB drives to 1TB.  I was able 
to partition and sync the raid devices, but I cannot get the new drive 
to boot.

This is an old system with only IDE ports.  There is an added Highpoint 
raid card which is used only for the two extra IDE ports. I have 
upgraded it with a 1TB SATA drive and an IDE-SATA adapter.  I did not 
have any problems with the system recognizing the drive or adding it to 
the mdraid.  A short SMART test shows no errors.

Partitions:
Disk /dev/hdg: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot      Start         End      Blocks   Id  System
/dev/hdg1               1          25      200781   fd  Linux raid 
autodetect
/dev/hdg2              26      121537   976045140   fd  Linux raid 
autodetect
/dev/hdg3          121538      121601      514080   fd  Linux raid 
autodetect

Raid:
Personalities : [raid1]
md0 : active raid1 hdg1[1] hde1[0]
       200704 blocks [2/2] [UU]

md1 : active raid1 hdg3[1] hde3[0]
       513984 blocks [2/2] [UU]

md2 : active raid1 hdg2[1] hde2[0]
       487644928 blocks [2/2] [UU]

fstab (unrelated lines removed):
/dev/md2                /                       ext3 defaults        1 1
/dev/md0                /boot                   ext3 defaults        1 2
/dev/md1                swap                    swap defaults        0 0

I installed grub on the new drive:
grub> device (hd0) /dev/hdg

grub> root (hd0,0)
  Filesystem type is ext2fs, partition type 0xfd

grub> setup (hd0)
  Checking if "/boot/grub/stage1" exists... no
  Checking if "/grub/stage1" exists... yes
  Checking if "/grub/stage2" exists... yes
  Checking if "/grub/e2fs_stage1_5" exists... yes
  Running "embed /grub/e2fs_stage1_5 (hd0)"...  15 sectors are embedded.
succeeded
  Running "install /grub/stage1 (hd0) (hd0)1+15 p (hd0,0)/grub/stage2 
/grub/grub.conf"... succeeded
Done.

But when I attempt to boot from the drive (with or without the other 
drive connected and in either IDE connector on the Highpoint card), it 
fails.  Grub attempts to boot, but the last thing I see after the bios 
is the line "GRUB Loading stage 1.5", then the screen goes black, the 
system speaker beeps, and the machine reboots.  This will continue as 
long as I let it.  As soon as I switch the boot drive back to the 
original hard drive, It boots up normally.

I also tried installing grub as (hd1) with the same results.

A few Google searches haven't turned up any hits with this particular 
problem and all of the similar problems have been with Ubuntu and grub2.

Any suggestions?

Thanks,

-- 
Bowie