I read the OP in a different way (op is wlcome to clear this up) : That is whatever OS or installer that loads up from CD is not able to see the slave drive.
Assuming this is really old HW, I can have a guess that OP is trying to install Windows 98. As I remember from those days, there was a problem with W95 / W98 installers if you do not have a discette that contains the IDE drivers. That means many installations went stucked.
At least until W98 second edition, that one was packed with drivers so it didn't ran into "stuck mode" that often.
End of history lesson . . .