High packing density disk cartridge with write protect mechanism

Details High packing density disk cartridge with write protect mechanism High packing density disk cartridge with write protect mechanism

1988-10-25

1992-02-25

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

050918150

ABSTRACT:
A disk cartridge includes a first identification recess for serving to prevent data stored on a magnetic disk from being erroneously erased from the disk and to prevent new data from being erroneously written on the disk, a second identification recess for discriminating a 4 or 6 MB disk cartridge from a 1 or 2 MB disk cartridge, and a third identification recess for discriminating a high packing density disk cartridge from other types of disk cartridge. The third identification recess is arranged at a point located on a straight line drawn between two recesses which are formed on the opposed side edges of the disk cartridge at a location neighboring the front edge thereof.

REFERENCES:
patent: 5041923 (1991-08-01), Iwata et al.

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