Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-06-14
2009-02-24
Nguyen, Than (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S161000, C711S114000
Reexamination Certificate
active
07496724
ABSTRACT:
Optimal performance tuning is enabled by avoiding the deterioration in the performance of a storage system caused by an erroneous setting in a tuning parameter. The storage system has a primary volume provided as an operational volume to a host computer, and a secondary volume capable of forming a copy-pair with the primary volume. When the load demanded in executing I/O processing to the secondary volume set with a second tuning parameter is lighter than the load demanded in executing I/O processing to the primary volume set with a first tuning parameter, the storage controller switches the primary/secondary relationship between the primary volume and secondary volume and provides the secondary volume as the operational volume to the host computer.
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patent: 2006/0031648 (2006-02-01), Ishikawa et al.
patent: 2006/0271758 (2006-11-01), Innan et al.
patent: 2007/0101082 (2007-05-01), Sugiura et al.
patent: 08-241227 (1996-09-01), None
Hitachi , Ltd.
Nguyen Than
Sughrue & Mion, PLLC
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