Do ALL configurations of the Toshiba A135 support dual hard dirves?

I know that many of the configurations of the Toshiba A135 laptops
support dual hard drives, but I'm trying to find out if this support is
present in all of the various configurations of the A135 (obviously, not
all models ... in fact not most models ... actually come with two drives
installed, although a few do). In particular, does anyone have a
low-end A135 (one of the variants that sells down in the $550 range),
and does it support dual hard drives?