yes, whitetop was correct. you cant just buy a flashed drive, well you posibly could but it would do no good. unless you had a jtag but thats awhole nother story and not posible with aslim.
what white top is refuring to is the drive has a "drive key" {this is a hex code} and the xbox knows that drive key so if you change the drive, the xbox will see a difrent key on the new drive and will not work.
that is why you see drive mail in services. but yes, i would assume team executioner is working on a slim solution