> And I want to use a mirrored root device on the system.
>
> > i can explain how it's done
>
> I would like to hear how.
>
the trick is to partition drives this way:

a about 10-15MB 4.2BSD

e - all the rest RAID

on both disks.

on a you do newfs, installboot and cp kernels on both disks (first would
be used for booting, second as a copy).

bootloader loads kernel from partition a, all rest goes from RAID.

don't forget to compile RAID and RAID autodetect in your custom kernel.


it IS possible to do it with kernels on RAID only but i did no testing for
that case