The disk unit includes a plurality of disk units for storing information transmitted from the host unit and {TAIL ~ a management information recording device}, formed by utilizing information storage areas in the disk units, for causing {HEAD ~ information} relating to a logical unit for storing information from the host unit to correspond to information relating to the units 
The disk unit includes a plurality of disk units for storing information transmitted from the host unit and { TAIL ~ a management information recording device } , formed by utilizing information storage areas in the disk units , for causing { HEAD ~ information } relating to a logical unit for storing information from the host unit to correspond to information relating to the units
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