Compatible data storage apparatus for use with disk assemblies o

Details Compatible data storage apparatus for use with disk assemblies o Compatible data storage apparatus for use with disk assemblies o

1990-07-09

1992-10-13

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

360 9901, 360137, G11B 1912, G11B 2342, G11B 1910

Patent

active

051556383

ABSTRACT:
A compatible disk drive is disclosed which is capable of writing and reading data on either of first, second and third interchangeable flexible magnetic disk cartridges of different storage capacities at first, second and third prescribed data transfer rates, respectively. The first and second disk cartridges have a first and a second capacity discriminate window, respectively, formed in different prescribed positions in their housings by way of contradistinction from each other and from the third disk cartridge which has no capacity discriminate window. The disk drive customarily employs two disk sensors for discriminating among the first, second and third disk cartridges. The invention ultilizes the binary outputs from the two disk sensors for the detection of the loading of any of the three types of disk cartridges, thereby dispensing with an additional sensor heretofore employed for that purpose.

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patent: 4901169 (1990-02-01), Hamaoka et al.
patent: 4995029 (1991-02-01), Kobayashi et al.

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