Electrical computers and digital processing systems: memory – Storage accessing and control – Shared memory area
Reexamination Certificate
2005-05-10
2010-06-29
Peugh, Brian R (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Shared memory area
C711S112000, C710S008000, C709S214000, C709S218000
Reexamination Certificate
active
07747827
ABSTRACT:
The storage system includes disk control clusters. Each cluster has channel IF units, disk IF units and local shared memory units. The channel IF units, disk IF units and local shared memory units in the plurality of disk control clusters are connected to each other across the disk control clusters by interconnection, global information control unit for storing management information about the disk control clusters is connected to the interconnection. Host computers and the channel IF units of the disk control clusters are connected via front-end switch for storing copy of the management information. Since the front-end switch reflects the contents of the copy of the management information on routing table, an access request from the host computer can be sent to a suitable disk control cluster.
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JPO Office Action dated Apr. 15, 2008, in Japanese with partial English translation.
JPO Office Action mailed Jul. 25, 2007, in Japanese with English translation.
Bradley Matthew
Foley & Lardner LLP
Hitachi , Ltd.
Peugh Brian R
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