It's supposed to be backup. Loading a 25 meg raw file on either one into CS5 is hardly going to be noticeable.
And I am not talking what it is capable of such as burst speed. I was referring to sustained speeds.
The one thing that a Drobo offers that no other system does is single/double redundancy along with the ability to use drives of different sizes and change them on the fly. All of these things have a value to me, they may not, for you.
Other NAS solutions can have single or double disk redundancy and to use disks of different size.
I think the main difference is that most other solutions wants you to visit an admin web page in the unit and explicitly press a button when you replace disks - just to confirm that you really mean it.

