The following three page ad (taking the form of an article about the Imaginet system) appeared in Canadian Datasystems, January 1986. More than any other source it gives a lot of detail about how the Imaginet system worked and the principles behind its design.
This article appeared in the June 1987 edition of PC Week and describes how George Weston Ltd. adopted Imaginet for its business needs. There is a brief mention of the origin of the Imaginet name.
A brief review from the same magazine in the August 1985 edition, describing how “up to 50 floppy disk images can be created on the host’s hard drive”: