Electrical computers and digital processing systems: memory – Storage accessing and control – Memory configuring
Reexamination Certificate
2006-11-28
2006-11-28
Bragdon, Reginald G. (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Memory configuring
C711S006000
Reexamination Certificate
active
07143262
ABSTRACT:
In a system comprising host computers and storage devices, storage regions maintained by storage devices are provided as virtualized volumes to the host computers by a virtualization function. In the case of allocating a vacant storage region from storage regions of a storage device to a virtualized volume, the virtualization function repeats to acquire and allocate a storage region from the vacant storage region until a remaining size within a required size becomes smaller than a maximum region size and, below the maximum region size, acquires and allocates a storage region, whose size is the smallest power of two not smaller than the remaining size, from the vacant storage region. If the vacant storage region includes a plurality of continuous vacant regions, the virtualization function selects the largest continuous vacant region for allocation.
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Bragdon Reginald G.
Hitachi , Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Vo Thanh D
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