Ok, run a 'lspci' and see if it lists two controllers.
Yup, it does:
# lspci | fgrep IDE 00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port SATA IDE Controller (rev 02) 00:1f.5 IDE interface: Intel Corporation 82801H (ICH8 Family) 2 port SATA IDE Controller (rev 02)
That definitely settles it. We now return you to your regularly scheduled topic...
Thanks, Alfred