No, smart status is hardware, absolutely nothing to do with what is on it.
That is odd that your external doesn't have it, the only thing I can think of off hand is that the ATA -> FW bridge is blocking the S.M.A.R.T. signal.
It is possible that the drive doesn't have it, but any hard drive in the past 5 or so years should I think.
EDIT: Ah! beaten by 2 people.