As per Luke's changes committed 20001030, the -current bootblocks have
support for booting off of a RAID1 mirror. The commit also mentions that
installboot(8) does not yet have support for installing bootblocks to
such a mirror. Has this support been added (as I see no such
announcements) or is there a way to get around this and install the
bootblock in some other manor?

Thanks Much,

Chris Lalor