I just tried to update another server from 8.2 to 10, and it paniced during
boot with
RAIDFRAME: failed rf_ConfigureLayout with 22
The line just before that reads:
WARNING: findroot: double match for boot device (bootinfo/bootwedge:wd0
bootinfo/bootwedge:wd1)
But with the working 8.2 it's similar:
WARNING: findroot: double match for boot device (wd0, wd1)
and the next lines are:
raid0: RAID Level 1
raid0: Components: /dev/dk0 /dev/dk2 /dev/dk4
raid0: Total Sectors: 134217600 (65535 MB)
All raid0's components are -A softroot.
I switched back to 8.2 and that works again.