Having just upgraded to a new 27" 2TB iMac, I exported all of my Master images from Aperture structure (G-Drive Desktop) to 2 2TB LaCie Ruggeds to new folder structure that will allow me then import into Lightroom. This will allow me to keep the same structure as my Lightroom Catalog. Yes there is a way to import from Aperture more easily, but it adds to collections.
Since I will have to import the images on to yet another HD, I will ask at this time what most of you are using as your Primary working drives on an iMac or other Desktop computers. Desktop AC powered or the smaller USB portables?
Are there any issues with long term durability as this primary drive will not travel much at all if ever. Are the portables becoming more reliable. All back ups will go to Lacie Rugged or equivalent for off site storage.
Just thinking ahead.