mdconfig: Writeable Vnode, is it possible?

Dear Guys,
After enabling memory disk, using mdconfig with the vnode type.
Code:
mdconfig -a -t vnode  -f file.img

How to make it write able , after mount the 'md', and try to write something on it, always received read-only filesystem.
Do i miss something,? I am not good with the filesystem thingy.
Thanks
 
Sorry for the late reply, i was away for days.


Okay here,s the output
mount -p | grep md
/dev/md0.uzip /usr ufs ro 2 2

Any idea on that?
 
It is limitation of geom_uzip.

geom_uzip(4):
The geom_uzip framework provides support for compressed read only disk images.
 
Ehmm, Then, what will be the alternative for a writeable compressed disk image ?
Thanks for the reply.
 
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