You still did NOT clarify...
Are you using a ide to cf adaptor with a proven cf card?
In this case, you use Hdtoolbox to format the cd card as a hard drive replacement!
And Are you using a PCMICA adaptor with a second cf card formatted as "fat"
In this case, you format the cf card with a pc using "fat" and you need several files for the amiga, like fat96 in the "L" drawer.
The easy thing is just to buy either or both, a setup ready to go cf card set from AmigaKit!