I am too dumb to understand geom(4)

[Sean Bruno]

How does one make geom_concat(4) load at boot, assume two devices are to
be used as a single concatenated device and then create
the /dev/<whatever> device for it?

My MIPS kernconf has:

# GEOM modules
device          geom_map        # to get access to the SPI flash
partitions
device          geom_uncompress # compressed in-memory filesystem
hackery!
device          geom_concat     # 
device          geom_label      # 
options         GEOM_CONCAT     # concatenation device support
options         GEOM_UNCOMPRESS
options         GEOM_LABEL

And yet, I am unable to use gconcat to do anthing useful:

# gconcat
usage: gconcat help
       gconcat list [-a] [name ...]
       gconcat status [-ags] [name ...]
       gconcat load [-v]
       gconcat unload [-v]
# kldstat -v|grep g_
                43 g_part_mbr
                42 g_part_bsd
                44 g_uncompress
                38 g_map
                41 g_part
                19 g_md
                35 g_concat
                37 g_disk
                57 g_class
                40 g_label
                39 g_vfs
                36 g_dev

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