Where can I find the complete description of your problem? Was it this one (quoted above)?
Please see riginal thread: "Update from 8.0.94 to Shrike: Software RAID 5 has to be erased?", 14-Apr-2003, https://listman.redhat.com/pipermail/shrike-list/2003-April/002148.html.
The only way to update this system that I see at the moment is to physically disconnect the array's drives, remove the references to it manually from fstab and raidtab, try the update again, restore the entries, and hope for the best. But I'll have do backup some 300 GB of data before I try this...
Greetings, asb