How make rootfs image for tiny210?

m44miri
Hi dear,
I have a tiny210 and i want create rootfs with Debian wheezy armel.
However,my problem is that,how i can make a rootfs.img with yaffs2 or
ubifs?
i downloaded debian armel with bootstrap in the directory roofs_debian.
now i do this:

$ mkfs.ubifs -q -r rootfs_debian -m 2048 -e 129024 -c 2047 -o ubifs.img
$ ubinize -o rootfsubi.img -m 2048 -p 128KiB -s 512 ubinize.cfg

where ubinize.cfg contains:

$ cat ubinize.cfg
[ubifs]
mode=ubi
image=ubifs.img
vol_id=0
vol_size=1800MiB
vol_type=dynamic
vol_name=rootfs
vol_flags=autoresize


is this true ?
if not true please guide me.also about yaffs2.