Write inhibition unit of magnetic disc control device

Abstract

Abstract PURPOSE: To inhibit data from being written onto a disc media partially by deciding the header part logically through a data conversion circuit for every read sector and by outputting forcedly a write inhibition signal to control a disc driving unit, etc. CONSTITUTION: Write inhibition switch 16 is provided in the external of microprogram control part 12 and is turned on and off, and a write inhibition bit is set as a part of the header part of each sector of the disc media. A user program, etc., are used in the user side, and switch 16 is turned on at a forwarding time, and header part D1 is read through data conversion circuit 14 by gate signal G1 in the unit and is decided logically for every one sector by control part 12, and write inhibition signal S1 is outputted forcedly to control a disc driving unit, etc. As a result, partial write inhibition of the disc media is possible in the disc control system. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Kyoji Hayashi

Bibliographic Details