if the installer fails to format and make partitions,if u got some other distro installed on ur hdd,use gparted to format and make partitions for sidux "/" root .then try to install sidux .
problem for the installer is it is not detecting ur different harddisks.
edit:even better their site explains the partitioning while in live cd?
http://manual.sidux.com/en/part-cfdisk-en.htm