Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1987-05-19
1988-11-08
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 78, 364200, G11B 5596, G11B 555, G06F 1300
Patent
active
047837055
ABSTRACT:
A disk data storage subsystem includes a head and disk assembly. A plurality of sectors in data tracks include a servo portion containing a prerecorded pattern of a plurality of repeating, time staggered, non-phase-coherent bursts, each burst having a predetermined integral fraction radial offset relative to the other bursts. The head is positionable relative to the tracks by a voice coil in response to information derived from a servo portion, a programmed microcontroller supervisor receives operational data storage and retrieval commands from a host system with which the subsystem is operationally associated and controls the position of the head during track seeking and following operations in response to servo information read by the head from each servo portion and further in response to the commands, an interface, with an SCSI interface controller, under the control of the microcontroller supervisor receives the commands and data blocks from the host system and for sending commands, status words and data blocks to the host system, a data sequencer and memory controller under the control of the microcontroller manages flow of data blocks to and from the disk via the head.
REFERENCES:
patent: 4103338 (1978-07-01), Cizmic et al.
patent: 4638384 (1987-01-01), Stewart et al.
patent: 4639863 (1987-01-01), Harrison et al.
patent: 4672613 (1987-06-01), Foxworthy et al.
patent: 4688166 (1987-08-01), Schneider
patent: 4716525 (1987-12-01), Gilanyi et al.
Bruner Curtis H.
Campbell Steven G.
Cooper Thomas G.
Luong Hoa V.
Machado Michael G.
Cardillo Raymond F.
Garland Steven R.
Harrison David B.
Quantum Corporation
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