Magnetic disc cartridge

Dynamic magnetic information storage or retrieval – Record medium – In container

Patent

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Details

G11B 23033

Patent

active

058868593

ABSTRACT:
A magnetic disc cartridge has a magnetic disc medium contained for rotation in a casing having a magnetic head insertion opening for giving a magnetic head access to the magnetic disc medium and a shutter member for opening and closing the magnetic head insertion opening. The casing has a first distinguishing hole which is formed in the vicinity of a corner of the casing and represents a reference storage capacity and at least one second distinguishing hole formed with its center positioned on a second straight line which is parallel to a first straight line passing through the center of the first distinguishing hole in parallel to a side edge of the casing and is off from the first straight line inward or outward by a predetermined amount. A disc drive system can distinguish the storage capacity of the magnetic disc medium contained in the casing on the basis of the first and second distinguishing holes.

REFERENCES:
patent: 5548571 (1996-08-01), Mistretta

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