Migrate a Celerra LUN?

Hi.

In my CX700, I have a 1375G LUN on raid5 6+1 ATA drives.  I would like to move it to a new shelf of FC drives.  Normally I would use the Navisphere Manager and create a new destination LUN of equal size or larger then migrate the ATA LUN to the new FC LUN. No problem.  However the LUN in question belongs to a storage pool on my Celerra.  This concerns me.

Can I go ahead and migrate the Celerra ATA 6+1 LUN to a larger 6+1 FC LUN?

And since the new LUN will be slightly larger, will the Celerra be able to use the extra space?

Thank you.

-Brian