Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1992-12-23
1995-07-04
Hajec, Donald
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 45, G11B 2736, G11B 509
Patent
active
054305810
ABSTRACT:
Increased memory capacity for a magnetic disk device is realized without degrading information error rate, by making the number of sectors at a given circumference of the disk variable in accordance with a radial direction of a disk. The number of sectors is made variable by deciding a predetermined information error rate from a ratio of reproduced signal output to noises of head, disk and amplifier at a maximum recording and reproducing frequency at a certain radial position along a disk.
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patent: 4016603 (1977-04-01), Ottesen
patent: 4799112 (1989-01-01), Bremmer et al.
patent: 4999720 (1991-03-01), Wilson et al.
patent: 5087992 (1992-02-01), Dahandeh et al.
patent: 5245595 (1993-09-01), Yasukawa
patent: 5258876 (1993-11-01), Danner et al.
Kameoka Tetsji
Moribe Yoshihiro
Obata Sumio
Tsuyoshi Toshiaki
Hajec Donald
Hitachi , Ltd.
Hitachi Computer Peripherals Co., Ltd.
Le Thien Minh
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