I see no one’s responded, so I’ll just update anyone that cares to look: I finally wound up backing up the RAID, reformatting, and creating a new one. It was a little tricky (since Panther’s Disk Utility didn’t recognize the disks, I had to do it in Single-User mode, which caused its own headaches), but it worked. Everything’s back where it belongs, and my B&W is zipping along with a new lease on life.
Thanks anyway!