10.6 Installer Doesn't Recognize RAID0 Volume

I currently have 10.5 installed on a 4-disk RAID0 volume on our Mac Pro. I am attempting to upgrade to 10.6 to the same volume, but the installer does not recognize it. The only installable volumes are the externals I have attached for Time Machine and some storage. I found the KB on the fsck is running so the volume isn't being displayed until it finishes, but I let the install sit overnight, and ran the terminal command to see if it was still running, and it was not. Still no RAID0 volume in the installable list. What else might cause this?

I had a similar problem with the 10.6 Installer not recognizing my RAID as updateable - didn't even "see" it. After consulting with the local MAC genius at the store I confirmed an upgrade path which was successful and listed below.
I was running Leopard 10.5.8 on a mirrored RAID containing two 500 GB drives with a third drive installed running Tiger.
My steps:
1. After erasing the third drive, cloned the RAID (10.5.8) to the third drive (Disaster Relief) using Drive Genius 3.
2. Upgraded the drive to 10.6.4 (computer automatically restarts from the 10.6 drive)
3. Used the Disk Utility in 10.6 to delete the old 10.5 RAID
4. Erased each of the 500 GB drives. (I used the "write zeros" security option)
5. Scanned each drive for bad blocks using Drive Genius 3 (just precautionary not necessary - hey I'm a bit paranoid with hard drives)
6. Recreated the mirrored RAID in 10.6
7. Cloned the 10.6 drive, Disaster Relief, to the new RAID
8. Restarted on the new RAID as my normal startup disk.
Notes:
a. Recommend you disable Time Machine during the process.
b. If you have Filemaker, be sure to deactivate BEFORE you upgrade the system or your activation key will not work after upgrade and you will have to call Filemaker for a new key.
Hope this helps someone.
Mike

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