> hi,
>       i modified rc.diskless1 to use union fs like:
> 
> mount_md 1024 /conf/etc 0
> mount -t union /conf/etc /etc
> 
> any reason why this might be problematic?

not sure, i think i tried this at some point and had problems with
bugs in the implementation of mount_union.  If it works for you
then i guess it is not problematic.  One thing you cannot do with
the above is delete files which are in the lower filesystem (not
that the current rc.diskless1 does, but in principle you might want
to do this).

the solution currently in rc.diskless1 actually does a merge of
2-3 different filesystems, so between the mounts you have to populate
/conf/etc as well.

        cheers
        luigi

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