Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2006-01-10
2006-01-10
Thai, Tuan V. (Department: 2186)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S100000, C711S167000
Reexamination Certificate
active
06985998
ABSTRACT:
A disk array device that prevents the processing of the host device from being interrupted or delayed by drive idle seek, idle seek being executed by all the drives at approximately fixed intervals. The disk array device predicts the approach of the scheduled times to start idle seek of each of the disk drives23, 23, . . . and exercises control so that, within the same parity group, idle seek is not executed by two or more drives23, 23, . . . at the same time. Within the same parity group, one of the drives whose idle seek scheduled start time is approaching is considered in advance to be executing idle seek and hence data access is denied beforehand. When a data read request with respect to the drive23that is considered to be executing idle seek is received, the required data is recovered by reading data from all the other drives23, 23, . . . belonging to the same parity group.
REFERENCES:
patent: 5418921 (1995-05-01), Cortney et al.
patent: 5606470 (1997-02-01), Shioya et al.
patent: 5793553 (1998-08-01), Smith
patent: 5838991 (1998-11-01), Shipman
patent: 5859738 (1999-01-01), Forehand et al.
patent: 6112255 (2000-08-01), Dunn et al.
patent: 6122131 (2000-09-01), Jeppson
patent: 6128762 (2000-10-01), Jadav et al.
patent: 6385000 (2002-05-01), Ottesen et al.
patent: 6502165 (2002-12-01), Kishi et al.
patent: 2002/0135922 (2002-09-01), Smith
patent: 0 978 824 (1995-03-01), None
patent: 0 978 824 (1995-03-01), None
patent: 0 820 059 (1997-07-01), None
patent: 3-76078 (1989-08-01), None
patent: 7-121306 (1993-10-01), None
Higashijima Naoki
Morita Seiki
Yagisawa Ikuya
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi , Ltd.
Reed Smith LLP
Thai Tuan V.
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