IMS 5000 Series Manual page 6

Another option on IMS systems is the selection of the floppy disk drive size.
There are two types of 5" floppy disk drives available from IMS, the double
density (48 tracks per inch) and the quad density (96 tracks per inch) half-width
drives.
Figure 1-4
5
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Floppy Disk Drive
IMS International
5000 Series Microcomputer s/7.0 1.8 3/page 4