IBM DemiDiskette

[Philip Belben]

Al Kossow wrote:
> If anyone is curious about what an IBM 4" floppy drive looks like, I 
> just uploaded a picture
> and the patent for it to http://bitsavers.org/pdf/ibm/floppy

Interesting.  A hard plastic envelope, like the later sub-5.25" formats; 
and the window for the head on the diagonal like the 14" diskette I 
mentioned the other day.

Presumably putting the head window on the diagonal like that means you 
can get the head closer to the edge of the disk, and make better use of 
the surface.  Anyone else know about this?  Like, why so few diskette 
formats did this?

Philip.