Microdrive

Microdrive (MD) is a brand name for a miniature, 1-inch hard disk designed to fit in a CompactFlash (CF) Type II slot. The release of similar drives by other makers has led to them often being referred to as 'microdrives'. However, 'microdrive' is not a genericized trademark and manufacturers other than IBM up to 2003 and Hitachi after do not officially refer to these drives as Microdrives. Some other companies such as Sony have licensed the name and sell re-branded versions, others such as Seagate have their own designs which fit in the same form factor.