It's both. Or should I say it's a CF Microdrive. It has so many names.
CF Microdrive Definition
Definition of: Microdrive
An ultra-miniature hard disk from Hitachi Global Systems. The Microdrive was developed and introduced by IBM in 1998 and acquired by Hitachi in 2002. The Microdrive uses a single platter the size of an American quarter that holds up to 8GB. Using one or two GMR heads, the entire mechanism is built into a Type II CompactFlash form factor.
I'll be right back, I have a sudden urge to kill my parents.....
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