Dear Patrick and Group,

setuidzero@gmail.com wrote:

[...]
> Instead of trying to detach the last mirror and reattach the old (good
> install) one, just mount the ctd devices at different points, copy the
> tree over, unmount, attach the mirrors and they'll "sync" (but since
> they're already the same, nothing should be transferred).

Thank you very much, this is probably the best solution.

Summary:
* change /etc/vfstab so that d21 (the copy with the original files)
gets loaded as the /usr
* reboot
* mount the metadevice (d2 and thus d22 with the new
installation) to a directory (say /tmp/media)
* delete the badly installed program files from /tmp/media
* copy the old program files (from d21) to /tmp/media
* umount d2 and change /etc/vfstab so that it will use d2 as
the /usr-partition
* reboot (and test)
* metattach d21 to d20 and watch it resynching

> Another way you could do it is to just not mount the mirror (comment in
> /etc/vfstab), boot up, mount the devices, copy, uncomment vfstab, and
> mount the mirror.

Well, it sounds more adventurous, but I didn't test it :-)

If nobody else has any comments, I consider this thread closed. Thanks
to everybody for his/her support.

Kind greetings,

Wim