How to connect disk drives from PC to Spectrum?

Hello jtn In message #18 [http://www.zx.pk.ru/showpost.php?p=9202&postcount=18] there is a link to a quote from the book by M. Hooke. But what information am I looking for? came across in another book by the same author (“IBM PC Hardware”, M. Guk, Peter, 2005): > Among 5' devices, the most common are 40-track (DD) and > 80-track (HD) drives. 80-track QD drives, wide > used in computers of the ZX-Spectrum family, in PC wide > were not widespread, although they were found in some models > XT-like machines /.../ Please note that in the 2005 pro-PC edition our computer is mentioned in the present tense. :)