Why don't you reinstall fresh in the first place, wouldn't this be simpler and quickier?
Never tried myself to repair a windows install after moving from a Raid 5 to Raid 1
(why bother to use Raid 1 in the first place..), but a reinstall might save you a lot of time - trust me.
QUOTE
but I couldn't find such an option in Windows 2008
Sounds like you broke something rather than the fault of
Windows 2008..
Reading the hardware specs for your machine I see that it is using embedded RAID so windows ought interpret the disk array as a single unit in transparent mode, if this is not the case then your array configuration might require some fine tunning on the BIOS setup - I know from my own experience that it's easy to get confused with so many options sometimes..
Try using just a single RAID1 array instead of bulking up several arrays on the same machine and see how it goes.
It appears that the boot loader is working but it fails to find the right path to the windows files so perhaps one could assume that they are now in a different partition?
One other idea would involve restoring windows back to the original Raid 5 and then try to convert to single disk (no array) to later convert/rebuild to Raid 1 would help - but then again, it's a messy work method and you save way more time with a fresh install and get an identical result.