Installing Zone�s roots on UFS �formatted� ZFS emulated volume.

I am piloting ZFS in our environment. ZFS seems to be very powerful and flexible feature in Solaris, which I like a lot.
Solaris will be used for �Container/Zones� hosting only.
I would like to:
1. Keep all LUNs in ZFS zpools.
2. Create �Emulated Volumes� instead of /lofi/dev/x (attached �mkfile� files with UFS file system).
3. Format �Emulated Volumes� (/dev/zvol/dsk/zpool001/vol001) with UFS and keep Zone�s root on them (Sun does not recommend to keep zone�s root on ZFS file system)
4. Add emulated volumes as addition raw storage devices to zones.
I went through many ZFS guides and forums but still can�t find answers to my three main questions:
1. Can zone�s roots be stored on UFS formatted �Emulated Volumes�? (�Emulated Volume� is stored in a ZFS pool.)
2. Can �Emulated Volumes� be easily resized if needed?
3. Is the above plan fully supported or contradicts some Solaris limitations such as �Don�t keep Zone�s roots on ZFS file system�?
Your help is appreciated.
Thanks

I missed on more item:
Can emulated volume be created without space reservation, so it would grow form initial size 0.00?

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