I've migrated luns in the past.  I'm sure I'm missing something simple (it's Friday)....

My system

CX4-240

Flare 30

Mix of FC and SATA

LUN in question is basic 500gb LUN.  I'd like to migrate it to a 600gb LUN.

Currently the 500GB LUN resides in a RAID 5 pool and is mirror/s to a remote system of similar configuration.

I created the new 600GB LUN in the same pool.  Clicked on the 500gb LUN and tried to migrate but my 600GB LUN isn't showing up...

What did I forget?