RAID 1 to RAID10 MIGRATION fails to boot CentOS5.3

Say, I booted CentOS fine on the RAID 1 (2 drive setup).
After MIGRATION to RAID 10 (4 DRIVES), boot fails with "GRUB".
How can I repair
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Assume you are talking about software RAID and follow the instruction like this:

In the website, step 5, you need to boot from the new RAID10. And fail on GRUB?
Here is the way to use boot CD to fix re-install grub (make sure you have new GRUB configuration file)

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andyalderSaggar maker's framemakerCommented:
GRUB doesn't understand how to boot software RAID 10, hardly surprising because the RAID software has to be loaded before an OS can understand RAID so the RAID software can't sit on a striped volume which means /boot has to be on RAID 1 rather than RAID 5 or 6 or 10. (or something like that). might be some help.
shaunwinginAuthor Commented:
Say, I'm using the AMD raid controller to migrate the RAID 0 and 10....
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