Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2007-05-08
2007-05-08
Portka, Gary (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S114000, C711S167000, C714S006130
Reexamination Certificate
active
10614802
ABSTRACT:
A primary controller operates to transmit write data and a write time to a secondary controller in the earlier sequence of the write times after reporting a completion of a request for write to a processing unit. The secondary controller stores the write data and the write time transmitted from the primary controller in the cache memory. At a time, the secondary controller stores the write data in a disk unit in the earlier sequence of the write time. These operations make it possible to guarantee all the write data on or before the reference time.
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“IBM 3990/9390 Storage Control Introduction”, 9thEdition, IBM Corporation, Oct. 1996, pp. 23-26 and 78-89.
Kishiro Shigeru
Nakamura Katsunori
Yamamoto Akira
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Portka Gary
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