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).

Abstract: A system for managing an object-oriented database in response to a request issued from an application program includes a database for storing therein both of a class having a definition of an object and an object generated from the class; a generating unit for generating a class and a plurality of attributes based on class definition information and attribute definition information, which are designated by the application program; another generating unit for generating an object to store an attribute value corresponding to the class definition information in accordance with the class definition information, the object generating unit including a-storage control unit for storing the attribute value related to a normal attribute into one storage unit area of the database when the request issued from the application program is related to the normal attribute, and for storing the attribute value related to a clustering attribute into another storage unit area of the database when the request issued from the appli