Method for accessing to a rotating record medium and an access c

Details Method for accessing to a rotating record medium and an access c Method for accessing to a rotating record medium and an access c

1983-04-08

1986-09-09

McElheny, Jr., Donald

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 48, 369 54, 369 59, 369111, 371 10, G11B 7013

Patent

active

046113142

ABSTRACT:
In an information storage system including a rotating recording medium having a number of information tracks, a head positioning mechanism for switching access position between adjacent tracks and a plurality of buffer memories each capable of storing one track of data, an alternate record area for storing data in substitution for an error data block is provided at an end of each of the tracks of the recording medium, and if an error data block is detected by a read-after-write check of the data during the rotation of the disc after the data has been written in one of the tracks from one of the buffer memories during the previous rotation of the disc, the data from the other buffer memory is written in the adjacent track or the data is read from the adjacent track and checked during a disc rotation waiting time required before the data write operation to the alternate record area is started.

REFERENCES:
patent: 4054921 (1977-10-01), Tatami
patent: 4145758 (1979-03-01), Drexler et al.
patent: 4225873 (1980-09-01), Winslow
patent: 4308612 (1981-12-01), Miyauchi et al.
patent: 4363116 (1982-12-01), Kleuters et al.
patent: 4433403 (1984-02-01), Baba et al.
patent: 4443870 (1984-04-01), Hazel et al.

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