GRUB boot loader failed in RAID 0

[Barry Yu]

I've suffering GRUB boot loader failed to boot up frequently in a system running raid 0 with Intel Matrix storage manager ICH900 chip, the "/" partition is installed in /dev/mapper/isw_cghfbiafhf_cts_home10, and the GRUB boot loader is installed in /dev/mapper/isw_cghfbiafhf_cts  (MBR), when the system failed to boot, I can only see the "GRUB" is displayed on left upper screen and stayed there without further advancing progress. I boot up to rescue mode with installation DVD and issued commands as follow;

chroot  /mnt/sysimage
grub-install  /dev/mapper/isw_cghfbiafhf_cts

And I see this message;
/dev/mapper/isw_cghfbiafhf_cts_home10 does not have any corresponding BIOS drive.
(Obviously GRUB was looking for something in /dev/mapper/isw_cghfbiafhf_cts_home10 wher the / partition is)
How can I restore the GRUB boot loader?
I will reply 10 hours later if any one needs further input from me.
Tks
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