Disk array unit
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United States of America Patent
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Apr 8, 2008
Grant Date -
Nov 24, 2005
app pub date -
Jul 18, 2005
filing date -
Apr 5, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A disk array unit connected to a host unit to give information thereto and receive information therefrom. The disk unit includes a plurality of disk units for storing information transmitted from the host unit and a management information recording device, formed by utilizing information storage areas in the disk units, for causing information relating to a logical unit for storing information from the host unit to correspond to information relating to the units. The invention further includes a control unit, when there is no access from the host unit to the logical unit for a predetermined time, for determining the disk units corresponding to the logical unit based on information recorded in the management information recording device and performing power saving of power supply for the disk units.
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