Flexible disk file access mechanism

Details Flexible disk file access mechanism Flexible disk file access mechanism

1976-12-20

1978-05-30

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 99, G11B 2102, G11B 5016

Patent

active

040926818

ABSTRACT:
A mechanism for moving an access arm carrying a magnetic transducer into the most appropriate position between pairs of consecutive flexible disks in a rotatable disk stack to assure that the proper disk is thereby accessed. The mechanism includes mechanism for preliminarily accessing each of the disks with a plurality of steps between consecutive disks in the stack and filling a position register with a unique identification number from each disk and with numbers of the steps corresponding to each of the disk numbers and mechanism for averaging the step numbers corresponding to each of the disks and placing the average step number in an access table to correspond with each of the disk numbers so that the access arm may be stepped to the step number listed for each of the disks in the access table for a reading or writing action using the transducer.

REFERENCES:
patent: 3931645 (1976-01-01), Dodd et al.
patent: 3974524 (1976-08-01), Griffiths et al.

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