Storage system including a storage control apparatus which controls operation of the system based on control information stored in shared memory
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United States of America Patent
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Dec 27, 2005
Grant Date -
Nov 27, 2003
app pub date -
Jan 31, 2003
filing date -
May 22, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
In a disk array control apparatus having a plurality of magnetic disk apparatus under its command for controlling data transfers to and from a host computer in a multiprocessor configuration comprising a plurality of microprocessors, a data path is provided between a cache unit and a shared memory unit, provided independent of the cache unit, for storing configurational information and the like required for system operation and control by the microprocessors, so that in the event of trouble with the apparatus or a sudden abnormality in main power supply, configurational information in a volatile shared memory unit is saved into non-volatile magnetic disk apparatuses from the data path via the cache unit by utilizing an uninterrupted power supply apparatus (UPS).
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