Overview

Model	Capacity	Size	Height	Media Type
Micropolis 1053 I	287K	5.25"	Full, Dual-Disk	Single Sided, Single Density / 48TPI

Complete MacroFloppy™ dual-disk subsystem similar to the 1053 Mod. II, except with a total of 287KB of formatted on-line storage (Mod II has 630KB).

The 1053-I is the dual-drive version of the single-drive 1042-I. The roman numeral "I" indicates it operates at 35 tracks / 48 TPI. This drive only accepts hard-sectored media when used with the bundled Micropolis 1071 controller.

The subsystem is usually presented with a capacity of 287KB. With the unit being a dual-drive assembly, this can be misleading, suggesting each drive would hold 287KB by using dual heads writing on double sided media. In reality, each drive is a single head drive and stores 143K, but two drives with 143K provide 287KB of on-line storage per unit.

Note on Micropolis' floppy drive naming convention

If you ask yourself what the meaning of the Roman numeral literals in disk drive names is, here's the explanation: Labeling convention for the Micropolis floppy disk drives from the 1040/1050 series is that each model number is followed by either the notation "Mod I" or "Mod II". These notations indicate whether the system operates at a track density of 48 TPI (35 tracks total) or 100 TPI (77 tracks total). "Mod I" storage modules have a black disk load actuator and "Mod II" modules have a blue disk load actuator.